Not everything about camping is fun and glamorous. For instance, a body's got to pee or poo some times. And, as I mentioned in the previous post, the 107LS doesn't come with a toilet, nor really even a place for one. Apparently, in years past, it was an option that went in place of the cabinet next to the door.
We decided that, being "older folks", we didn't want to be scurrying across a campground to the bathhouse in the middle of the night if we needed to pee, so we purchased a cassette toilet that would be installed in place of the cabinet. It was, after all, only held in with a few screws.
Part I - Cabinet Removal
Of course, there were to be complications. First, and most obvious, was an electrical outlet and a pair of USB charge ports mounted in the side of the cabinet that would have to be moved.
The second, and not at all obvious challenge was that the sidewall of the cabinet was stapled to the end of the step. I have no idea why the folks at Coachmen thought that was necessary, as it adds exactly zero to the structural integrity of the cabinet or the step.
Other than the staples, the removal of the cabinet was fairly straight-forward -- remove every screw that looked like it was attaching a cabinet and tug to find those lurking in dark corners. Once that was done, it turned out to be a relatively simple matter to cut a new opening for the electrical outlet in the front wall of the trailer, and pop it in place (after shortening the wiring appropriately).
The two dangling wires are 12V wiring to the USB charge ports. I haven't decided exactly what I want to do with those, but I do know that I don't necessarily want them in the "bathroom".
If you look closely, you can see the holes where the screws were. A little TLC, and they'll be nearly invisible, I think. After testing the outlet, I called it a night.
Part II - Toilet Mounting
This is so simple, it almost doesn't deserve mention. Yet, here we go anyway.

The toilet we chose has an option to use a mounting plate to secure it in place, to keep it from sliding around during travel and use. It wasn't a lot of money, so we decided we should have one. After some brief experimentation, I chose a location for the toilet that allowed plenty of space to operate a lever on the right side of the toilet that allows it to flush. I also made certain that any other controls and latches were easily accessible. Four screws mount the plate to the floor.
Finally, the toilet simply snaps onto the mount. Exciting stuff, eh?
Part III - "Walls"
Privacy on the pot is a desirable thing. In a pop-up, though, it's a bit of a trick. There's no easy way to build a hard-walled stall, and in this trailer at least, it would need to be incredibly small. Fortunately, there's Amazon, where one can find any manner of helpful bits and bobs.
Donna found a flexible curtain track kit (available in several sizes -- we ordered a 5-meter kit, knowing it would be more than we needed) to attach to the ceiling. A shower curtain (or curtains) should provide adequate coverage. We are camping, after all. At least it's not a folding toilet with a plastic bag in the corner of the tent!
Putting up the curtain track was a entertaining, to say the least. The instructions were written in an odd mixture of Chinglish and Yoda-speak, and didn't include a couple of vital pieces of information -- like the track has a top and a bottom, which Donna spotted, and the thin steel band molded inside the plastic! That made cutting the track to final length a bit tricky. I was worried that the included plastic anchors and screws would be too long, so I got some shorter ones to use in their place.
I started the track installation by planning out where I thought the track ought to go. There are a few obstacles that I needed to avoid, notably the track for hanging the door when it's not in use, one of the ceiling lights, and the wire that runs from the ceiling light to the little over-bed light/fan unit.

There are four basic parts to the track system -- ceiling clips, end stops, rollers, and the track itself. The manufacturer recommends placing the clips about every foot, and I chose to place them a little closer in some places. I began by marking the first few clips, and drilling small exploratory holes to see what I was going to run into in the ceiling. As I expected, I wasn't finding any joists or stiffeners, so I proceeded to mount the clips using the plastic anchors.
To aid in planning and testing, I did partially install the track before installing all of the ceiling clips. I'm not sure how necessary that was, but it got the job done. The track makes a kind of odd loop around the toilet, across the ceiling, and then turns around to include the ceiling lamp before heading back into the corner above the toilet.
Once the track was mostly in place, I slid the suggested quantity of the rollers onto the track, placed the other end cap, and snapped the track into the last clip.
All that remains is to acquire and hang the curtain(s), which I'll leave up to Donna. It's possible that I may need to shift the toilet slightly away from the sidewall of the camper. I won't know that until I see how badly the curtain bunches up behind it.
I have nearly enough track left over to install a privacy curtain across one of the beds, but not quite enough mounting clips, although more can be ordered separately. I'm feeling pretty certain we will be buying more of this product -- we need a blackout curtain in our living room for TV watching (the window faces west, and in the evenings, the sun shines directly on our TV, and I can see this being very useful to create lighting valances for my model railroads), so I can order extra parts then, assuming we decide to add more curtains inside the camper.
So that's that. Once the curtains are up, we'll have our "bathroom".
Part IV - Epilog (Update 6/25/19)
We ran over to Target and picked out a couple of shower curtains and hung them up this evening. Voila!
When not "in use", the curtain blocks the view of the toilet, and when deployed, there's plenty of room to take care of what needs taking care of.
I chose the pattern, and it's probably a little "busy", but it starts to bring in some color that's otherwise lacking in the mostly brown-and-tan interior of the trailer.