i always try to float the plugs at the head of the riffle , mot letting them dig in till they are in deeper water, try to float them through the rocks till there in deep water then you got deeper water to put your oars in an start pulling the plug under .its tricky getting them through the riffle at the head of the pool, if you hang up , you can always go over to the shallow side an get out an walk back up to free the plug ,