I attached a snap hook to the bucket's lanyard and snap it to the tramp lacing line just aft of the mast step. I stuff the lanyard and bucket into the pocket on the top of the tramp. During one of my practice knockdowns, I used my Hobie bucket to help me get the boat back up by myself. I adjusted the lanyard's length so that when it was filled with water, with the lanyard led over my shoulder, as I lean back while holding onto the righting line the bucket lifts itself clear of the water adding its weight to mine.
This method does create the need to pull the bag out of the pocket and then to toss it over the hull that is in the air. This can be rather inconvenient to accomplish but it does put the leverage higher so that it helps you more.