[@Raylah] Sea water can be filtered and sanitized into drinking water. Given the date and recent advancements in technology, it's far from out of the question. Fishing on the move fixes a lot of the food issue. Anything else can be covered through hydroponics to grow vegetables and the like for consumption.

Fuel is the primary source of frustration for the flotilla, and the main reason it ever enters into armed conflict. They take whatever they can, wherever they can. Buying, stealing, and scavenging fuel is how they survive. It isn't a sustainable lifestyle, of course, which is why I figured they're a relatively new collective. Their ultimate goal would be to find a place where they can permanently settle that isn't occupied already or totally ravaged by particularly intense nuclear fallout.