If you have not done a "Walk Through" or PDI (Pre Delivery Inspection),
I would recommend taking ALOT of notes and ask them to be patient with you as you take notes. We actually took our Canon HG10 camcorder and recorded MOST of the PDI. We wanted to make sure we had recorded the some specific things such as the Fridge, Oven, Stove, Furnace, Tires and all maintance needed on the those devices.
We reviewed the video several times when I winterized it the first time.
If you are the ones that need to winterize the 5'er, you may want to take GOOD notes on the bypasses and other recommendations they have for winterizing the 5'er.
I would also ask them to start the Furnace while you are there. That way you will not have the awful smell of the furnace on your maiden voyage.
CONGRATS, GOOD LUCK and HAPPY CAMPING in you new 5'er!