Safest bet for hauling a bunch of gear with a smaller bike would be a sidecar. They're popular overseas with scooters and little bikes, but can be pricey unless you've got a GOOD fabricator connection. Geometry needs to be on point or you'll constantly fight with it. Basic framework with a motorcycle fender, a rear coilover shock, a trailer hub and wheel, and a truck toolbox mounted = storage galore. If you hate the thought of riding rigidly upright, there are "leaners" too. Of course, all sidecars limit your lane position freedom and you always need to be mindful of how much wider this would make the bike.
Ultimately, if you plan to pack enough to be self sufficient for weeks at a time....get a Wing and a trailer