Wow brick - that thing is uber nice. I'm jealous for sure (: How much money do you have in that thing as of now?
Tell me more about this "5 on 5" adapter. I am going to want to put Jeep wheels on my trailer-to-be at some point and I guess I'll need some of these. Do they make the wheels much wider (in effect)? I'm like to avoid that if I can. FWIW, I've got Dexter 3500 lb hubs w/electric brakes.
As for a tent - I'm pretty confident you'll have to make something yourself. Do you need a real tent that seals up, or just some shelter? If you just need a shelter, there are some easy ways to do it - I plan to do this on the trailer I'm building. Put a flat top on it and weld on some things in strategic locations so I can throw up a couple of polls and get a quick tent-like shelter up there if I need one.
That is a nice looking trailer (: