Re: Water stuck in bilge - Boat too low on trailer? Please help, PIC INSIDE.
Reverse the hitch bracket upside-down then flip the rollers over so the heavy side is down, then lower the whole thing until the bow eye is right under the top roller and run your safety chain between the rollers.
If raising the tongue is stressing you out hook it to your car and go & park on a hill to drain it out.
If the deck is sealed there shouldn't be any water under there so you might want to check that out.