Barb, the Cruiser manuals are useless -- vague generic advice like "check your lug nuts."
But there are good manuals online for each of the subsystems, like the water heater and the fridge.
Welcome to the club, by the way! Where are you located? And is this your first RV?
2012 Fun Finder X-139 "Boondock Style" (axle-flipped and extra insulation)
2013 Toyota Tacoma Off-Road (semi-beefy tires and components)