Very interesting and good ideas for future camps.
We have developed over a number of years a water powered spit we use to cook a boned out wallaby, rolled in bacon and herbs.
One of our annual camps is held on the bank of a flowing river.
We have a push bike wheel with paddles attached out in the flow, driving back to a small baby pram wheel that is slowly spinning a shaft.
The meat being cooked by a fire on the river bank that the shaft rotates over.
It has taken some time to get the reduction and height right but it now produces a great novelty roast.