The NVA/VC used 2 wheeled bicycles as a way to move supplies during the Vietnam war. Amazing the size/weights of load they could move over rugged terrain.

A well packed mountain bike could be pushed a long way. and used as transportation.

I've used a 4 wheel heavy duty garden cart to move gear at out PWYP and Finger Lakes Rendezvous, it's part of my kit.
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Our most important survival tool is our brain, and for many, that tool is way underused! SBRaider
Head Cat Herder