I check all systems, water, electric, stove, lights, stereo, TV and frig.
I check the roof and caulking.
I sanitize the fresh water system, had the wife take a shower and checked for any leaks.
I check tire pressure.
I roll up under the TT and make sure I don't have any bands loose on tanks or anything else that doesn't look right.
Hook it up and check lights and brakes
This year I blew out the water lines and put anti-freeze back in until I get South in 2 weeks.
2016 Toyota Tundra SR5, 5.7 V8