I have a 1969 Harris pontoon that has water in the pontoons (back section). There is pipefitting plugs on the top of the logs right in the middle of the stantions (for lack of a better term)from the deck to the logs. No way to get a wrench in there, much less do anything if I could get the plugs out. What I want to do is drill a hole in the back of the logs and let the water drain out. After which I can either use epoxy to plug the holes I made or make a larger hole and put a plug there. Will this work? Any other ideas?