I just removed the water fill and hose connection from the utility hatch on the left side of our Uhaul
. Had a piece of heavy plastic that was a parts bin divider, cut it to size, put on some sealer and riveted it in to cover the holes. Robert, could you put some kind of rain deflector over the new hatch, like for a stove vent, or the stick on plastic gutter. I'm too lazy to read back through this entire thread, but is some kind of boat accessory hatch available, or has that already been mentioned.