I'd like it if the counselors needed to do several things that required team cooperation in order to take Jason down. Firstly I don't think you should ever be able to KILL Jason just stop him by say chaining him back to the bottom of the lake. So the counselors would need to find a chain, lasso jason without getting killed, find a right size rock, repair and fuel a boat, find a rock heavy enough, then drive the boat out to the middle of the lake with Jason attached. Or something similar