I have been a long time paddler (20+ yrs) and just discovered the Westfalia/vanagon utility vehicle
a few years back. I now own a Syncro 4 wd model for my primary boating escape pod !
I carry french press and coffee for sure, spare clothes, smoked oysters, corkscrew-bottle opener, mac and cheese, energy bars... all sorts of stuff. After a season of trips under your belt you will begin to whittle it down. Pmail me if you want my excel spreadsheet <grin>