I'm a fan of the Zip Stove, previously known as the Sierra Stove. Down here the one thing you can count on is a good supply of wood to burn.

The batteries, wiring and motor are somewhat vulnerable points but both the wiring and motors can be pretty tough and high quality versions the motors used in VCRs and tape machines can have a BTBF of 100,000 hours or more.

Batteries are an issue but lithium cells are very reliable. There may be some option for solar cells, manual generation or other power sources.

I wonder if I could rig a high-reliability wind-up motor driven fan.