What I suggest is that you read this article about renting a RV and print out the check list we created for when you pick up the rental. Reading the article now will prompt you to think about the kinds of questions you might want to ask the rental house.
Here are a few more tips about RV rentals you might find helpful....
Overview of RV rentals
A checklist to print and take with you when you pick up the rental
An overview about the types of RV campgrounds
An overview about boondocking in a RV
A discussion about visiting national monuments and national parks
There are three primary styles for RV parks and hook-ups.How do things like electricity hookups and water hookups work at RV parks?
No Hook-ups: The usual set-up in national parks and USFS campgrounds, water and dump facilities are found on-site, but not at the campground space.
Water & Electric: Water connection and ~30 amp power connections are located on the driver's side of the vehicle allowing for easy hook-up
Full Service: Water, sewer and 30-50 Amp power box all located at the driver's side (as you back in to a space) for easy hookup.
Mark