All along, I've been planning on using the standard deal, like in the first picture, which is basically a slight modification of what is in almost every garage door in the country. But after thinking about it, I don't know that I like that setup: the rods that I've seen, the round metal things that will go into the wall of the camper to keep it closed, seem pretty flimsy to me, the installation is a hassle, and if your TD ever settles, even a little, the rods may no longer line up with the holes.
So I've been thinking about doing it differently, of using Jeep truck latches, like the ones in the second picture, on the outside, one on each side of the galley hatch door. These are VERY sturdy, very cheap, are made to withstand the rigors of being outside (they're made to be put on the outside of a car), and will be a piece of cake to install. And I think they look like they will work better for what I want to do.
I understand that the Jeep latches cannot be locked, but I don't really care about security: if someone wants to go into my galley when I'm there, the only thing they're going to get is practice. I just want something that will keep the hatch closed, securely, when we're not around or (and this is the important part) when we're towing it.
Does anyone with TD experience have any thoughts? The best suggestion will with the Kensington & Allegheny lottery: a dollar a year for a million years.

Thanks for reading.