This style camper hatch may put you in trouble for rot:

Thanks for posting! It made me go and and check mine. AF seems to have a pretty decent set up. There are no holes or stanchions on the bottom to allow water to seep out. Just the front seam where the plastic bin meets up with the TC framing. That appears to be sealed pretty good, but still an area to keep an eye on. Im going to run another bead of silicone along mainly the bottom just to make sure.