The concept of a truck with camper shell can include a generator set and gasoline, spare propane tank(s), fire in a can, and other bulky heavy and perhaps odorous stuff.
You may find your camping stuff and tools category is too light. I have more than 150 pounds in tools, fire shovel, rope, tree branch saw, spare power cables for different connections, surge suppressor, extra water tanks, blocks for setting up the trailer to make it level, cleaning supplies, rain gear etc.....
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic model 30 twin beds, 50 amp service, 900 watt solar system, Centramatics, Dill TPMS, disc brakes, 16" tires & wheels