F&B -
Good advice by prior posters. Since you are so far from the dealer, it would be great if you could try camping out a night or two nearby. If you have any questions or difficulties maybe someone from the dealership can come by and assist.
While picking up the camper at the dealer, just make sure everything works - refrigerator, furnace, water heater, AC, TV Antenna lift, toilet, etc. If it has an awning make sure dealer shows you how to set it up if you're unsure. Make sure the awning cranking rod is 'present and accounted for'.
To check these things the trailer will have to be set up. Have dealer show you how to set up the trailer, and take it down for travel. Take good notes, and pictures if possible for later reference. Trailer is not particularly hard to set up or take down, but there is a sequence that you'll need to follow or else you wind up doing things twice! Best of luck with the new TM!!