With regard to storage boxes....
1) determine where they will go in the truck or in the camper during transit
2) determine how much "stuff" you need to carry so you know how many to buy
3) determine the dimensions then can't exceed in order to fit where you want to carry them (inside or outside)
4) determine how much weight they need to carry so you can load/unload them single-handedly if needed.
5) determine which mfger makes a product that works for you and your budget and read the WTW for "field reports" on that mfgers products before plunking down your cold hard cash
Back in the day, it took a couple old plywood ex-military footlockers to haul around the "stuff" I needed until I had a camper that had space for certain things so they stayed in the camper all season long. They doubled as tables or work stations next to the campfire BBQ grill with a washable cover on the top...that was two of 'em.
