Portable 12 volt rig
With the idea of a solar-powered float trip, I got a small ammo box and slipped two PowerSonic sealed 6v batteries in. Built a connector panel with an automotive fuse and various plug outlets (12 v car type, blade connectors, etc.) Drilled two tiny holes in the side of the box and ran wires through rubber grommets so it can be rigged on a raft and connected to a solar panel (or a battery charger for small AAA, AA, C, and D cells).
Plenty of juice to inflate several boats, and use LED camp lanterns at night. If I ever use it for a long trip, I'll get a large Sierra ZZZip stove or two (with an electric blower fan, to burn driftwood and old campfire charcoal).
No propane tanks or white gas or silk mantles to bust. No hiss. Just the sound of the river.