FWIW-we had an internal LP storage locker...I sealed the deck
lid, converted the space to a hanging locker in the Mastersuite (a much better use of the space), and mounted the LP tank on the aft side rail. As someone pointed out, LP is heavier than air, so instead of sinking into the bilge
, it now sinks to the water, outside the boat
, if we have a leak. We used a painted steel
tank for several years, and have now replaced it with a F/G tank. All in all, a good conversion!