My wife and I were lucky to have a dry open area to air ours out in, when we packed up under rain conditions.
Other than making sure all your appliances work, and the drains don't leak.
Bring some basic tools with you, and perhaps a few seals and such for the plumbing'ish stuffs.
We did the tent trailer for two years, till we figured out what we wanted out of camping. Took about 3 trips out to figure out what things we needed for our trailer, and camping style.
Tips? Get comfortable setting up and taking down, in case you need to take down in a hurry for whatever reason. Also, we were lucky to have a pop-up with sturdy supports, HOWEVER...
We did take a trip to eastern Oregon, and a T Storm blew through one afternoon with HUGE winds and it was broadside, really bending things around. We started with cracking some windows to relieve a bit of "sail" pressure. Luckily a guy brought us some good line and good stakes to tie up the upper ends of the supports and stake them down so they wouldn't get bent over.
If you plan on camping in any high wind prone area, think about something to take care of that with a pop-up. You don't want to have any broken supports from high wind stuffs.
I'm no expert, but I've stayed at a Holiday Inn in the past. >.>
