The pre delivery checklist in the link above is a good one. It may have items on it that do not apply to your unit, just skip them.
Make sure your dealer does a thorough walk through with you. Explains how each and every system works. make them put water in the system so that all the plumbing can be checked. check the rear dual tires, you may want valve extenders put on to make checking and adding air a bit less inconvenient.Then ask questions, lots and lots of questions on anything you are not completely clear about. Even if is how to open a cabinet, don't be afraid to ask.
If possible do not sign any final papers or write the check until everything is to your satisfaction. Those little warranty issues seem to get done much more quickly and efficiently if the papers have not been signed.
When that is all done, take it out and have a great time with it. And, BTW, welcome to the forum. There is a wealth of knowledge from the people here, come back often, and ask, ask ask.
Tom and Barb
'07 Winnebago Voyage 35L
Workhorse W22 chassis FMCA 219315