Go to RV Basics.com and they have checklists for everything. Also I would advise a driveway campout for a night. anytime you go inside to get something (besides food) write it down. Then go buy it the next day. I carry a basic tool box, lawnchairs for 8, BBQ and tools for it, assortment of tapes, glue, towels, screws, nuts, etc.(for minor repairs until I get home), a 6 ton bottle jack, small step ladder, camp ax, make sure you have dump hoses, white water hose, etc. We also have a separate set of clothes, towels, pots and pans, dishes (most from either Goodwill or Walmart), bathroom supplies. All we do is load the food, dogs, kids, BEER, and go.
Have fun and enjoy
2017 Grand Design Reflection 303 RLS
1997 GMC Sierra 3500 Dually