Congrats & welcome to "the club".
Can't speak to your particular coach and since you've already owned a 5'er, you prolly know about much stuff already. Would suggest on your PDI you get to see and check the levelers in action and insure no leaks in lines...also have them show you where the breaker for them is located and how to set.
Bring a DVD and test it on the TV's to insure all the hookup wires are done right.
I assume you will have the 110V fridge so probably will have FOUR 6V deep cycle batteries... you might want to check those to insure they are new and charged and in good shape. Make sure they are not Dual Purpose 12V batts.
There's several good examples of PDI checklists here on the forum if you want to be thorough and I enclose the one I used as a supplement for my own lack of experience some of which was inspired by noting the problems other G'town owners reported here! Good luck with it all.
2015 Georgetown 280DS
2014 Vespa LX150 2014 StellaAuto 125