Sunbeam":2b7cs093 said:.....
The other potential concern I had is weight on an un-cored and un-bunk-supported part of the bow when trailering (with water in the tank). ....
Sunbeam
I think it would be pretty easy to put a small bunk or extra roller on the trailer to support that area of the hull if you felt it was necessary. It would only take a few parts from any trailer supply place.
Although I haven't done much overnighting yet, from what I read you probably wouldn't want to have water in the tank (whatever it was made from ) for long periods anyway (it gets funky). Since my boat is likely to be stored away from my home I think I would not be leaving water sitting in the tank. If we were going out for awhile, I'd fill the tank before we left the dock and drain any remainder when we got back. The guy who had the boat before me installed an electric pump for draining the tank in a reasonable amount of time. It can also be used as a washdown.
I was wondering how I was going to get 20 gallons of water to the boat before we went out. Some places we launch from don't have water at the docks. If I relocate the water tank and replace it with a bladder, I'll have a convenient container for moving water to the boat from home. Just need to get a transfer pump.