Thanks for the comments!
Having the first outing go so well is encouraging for future trips. Some feedback from other sources and thoughts for next time:
1)
"You slept with the spare tire? The smell would drive me nuts!" The tire is two years old and does not seem to have an odor. Or perhaps I was too tired to notice. I had a soft plan to remove the tire and slide it under the trailer for the night. However, by the time I came to bed, it was late and I was tired. I just crawled in and passed out.
2) Staying with my rear slide-out plan would have kept my feet off the door while sleeping. But I have to admit that tucking the wall up to the ceiling when not in use is VERY convenient, especially since I cannot forget to "pack the door!" I'll include a clip of how I make the change in an upcoming video. Making the the transition from inside is quite difficult since the trailer is so small. So, I wind up resting the wall on my head and back when moving in and out of the trailer during setup and tear-down.
3) I mentioned that I bumped the wall a time or two in the night. I sleep mostly on my left side. Perhaps moving the spare tire to outside and then shifting my mattress to the driver's side of the trailer may give me a little more room for slinging my arm around.
4) My ceiling is not attached at the rear. Instead, it rests on a 2x3 and is able to flex upward an inch or so. That turned out to be a good fit to shove one end of a black towel to hang as a curtain. I'll look into something a little more permanent. Still, it was good for minimizing outside light intrusion in the morning.
5) Some have suggested mounting a water tank beneath the trailer or a "kitchen" on the door. I'm inclined to think of this trailer as a "hard-sided tent" instead of an RV. So, a portable water dispenser or jugs should more than suffice. As for a "kitchen," I suspect I can just do what tent-campers do. Food was provided by the club last weekend. So, I didn't worry about food. I'd probably just use a little propane burner.
6) I didn't mention it before, but I actually managed to find myself getting cold that evening. It was around 85°F into the evening. I think it was still ~80 when I went to bed at 11pm. Fitted sheets don't seem to work well with air mattresses; so, I just spread a sleeping bag on top of the mattress and then laid on top without covers and then ran the MaxxFan at 50%. It didn't take long to decide to cover with a lightweight fleece blanket. Later, I reduced fan speed to 20%, which was just enough to let-in a little outside sound. Eventually it dropped into the 60s and I turned the fan to 10% and used some of the sleeping bag to cover my legs. I used to sleep very well in cold shipboard berthing areas with a single-sized comforter. I'll probably get one for use on camping trips, maybe a second for topping the mattress.
Speaking of colder evenings, the first posts in this thread addressed the serious concern of suffocation in small trailers. I have addressed that with installed ventilation. But what about when it's cold? Is the fan still needed, even at 10%, to force an air exchange? Or is cracking a window sufficient? I don't think my little window "cracks." It's either open or closed. I can probably put a little piece of wood in the window to hold it at an inch. Even with the window closed, I know there are still places along the corners of the floor where air can escape if I have the fan on low. What do most of you do?
Thanks!