Scrounge any used cans from the local photo processing shop. "Butt" join your bulk film to the tail left out of the used can and use household sticky tape to make the join. You will lose the last frame unless you load in a darkroom.
Alternatively you could go out and buy joiner tape and reloadable cans, but I figured you wanted quick and reliable, and some way of loading up fifty or sixty cans before a trip without ginning about.
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