Now it looks like the horses are PART of the DETOUR, so the two tasks might be load cans of water and carry them WITHOUT SPILLING, of course,, by ox cart (and we do notice several teams having a bitch of a time and they may then switch to the TRAI task. Then proceed on to the ROADBLOCK. The other task could be to ride the horses over a obsticle trail or perhaps herd cattle (which do not see). So the DETOUR could be PAIL or TRAIL. AND the ROADBLOCK could be FLAME THE WOOD PILE (thus the fire extinguishers!)