To me its not really what to ask. The dealership no matter good or bad is going to tell you what you want to hear. You have to be in the drivers seat on this deal.
There are alot of great PDI forms on this forum, I would find one print off a couple of copies and take one to the dealer. Tell them you plan on spending all day if neccessary to complete the pdi. Remember this is your last time to get things fixed before the camper is yours.
As for warrenty most of the items carry only the original owner warrenty. The dealer may have a 90 day out the door type thing. Good luck