Welcome to IRV2, glad to have you here!
I would just hook it up at home. You can then check the air, heat, refer, inverter/charger, batteries, lights, micro/oven, stovetop, water heater (electric/propane), faucets, drains, holding tanks and valves, levelers if applicable, generator if applicable, vents, fans and anything else you can think of.
I would not take it to the Dealer blind and tell him to check and fix anything that is wrong. First, they probably will not check everything and if they do, they may spend a lot of money fixing a simple problem you could solve yourself.
With that vintage model, you may have to look a little to find parts.
Good Luck, Jim
2005 Safari Cheetah 38PDQ - 2009 Ford Flex
Me (Gatogonow), The Boss (DW), Honey Bunny, Maggie May and Mollie Kay (The Gatos)!