Thanks for the good words, Lou. Here's some late breaking news:
capnTelescope wrote:What worked well
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The hatch
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You may recall the considerable time and effort spent developing the hinge design for the hatch. That work has paid off handsomely. The hatch doesn't leak to this day. The B&B has been towed through and camped in plenty of rain and mud, and there has been no water intrusion into the galley. From above or below. The only complaint comes from the side gutters working as designed and splashing rainwater on one's feet while sitting in back under the easy-up. I'd also give the aluminum skin a bigger drip edge on the sides, just for peace of mind.
After all the work that went into it, I keep the B&B garaged, even though the hatch works fine. The hatch isn't the only place where water can try to enter. Plus, the B&B uusually goes into "drydock" after a trip, for some attention to details.

I should have knocked on wood.

No sooner did I say "Success!," then I get a small leak. It's not the fault of the hatch design, it's got something (I don't have it figured out yet) to do with the hole I drilled through the top gutter to feed wire through for the backup camera. Since the backup camera also mysteriously quit working, I'll be looking for a solution that doesn't require a through hole and great gobs of caulking.
Goes to prove the general rule of not having too many penetrations in the skin.
