
access to mechanism: My advice is that they only need fiddling with about once every "coon's age" but that might be longer than your trailer will last and it might not be. So, make it with screws so that if and when need be you can dismantle it without too much hassle, but I don't think you need it to be readily accessable or anything like that. If you are worried about that then I'd say put a hatch on the center, with the whole cover unscrewable, but use it for something else too. Like lights on the outside center of your door, and upper inside of the door (for interior light) or something like that. Then that way you have a double excuse for having it and it's there for the access to the latch mechanism if you need it, or wiring to the lights... (Once again, what can you imagine for the door? Mirror on the inside? Running water through the door for the 2" flower box on the outside so the flowers grow up to cover up the latch/knob?

But I wouldn't make it a "permanent glue shut to the whole surface." It would be smart to have the removable panel, at least in the center over the mechanism, however you do it, easy swing open latched panel or lots of screws.
Um, being in a position to advise about cabinets in small tight areas, like walls... You could hinge and latch a mirror over the center, and have a removable say, piece of tarp or plastic to cover the mechanism at the back wall of the compartment to keep the oil and grease and stuff off of the real use of the compartment for things like pens and pencils and paper. (business cards for the "Bonnie Built" tiny travel trailer company. cards for contact info for those who want future advice on their own build. ;-)

p.s. can I get you to add a second line in your "forum signature" to link to your picture gallery? that way I look over any part of it for quick reference, in a "new tab" while still keeping this tab open and just switch back and forth. I'm still trying to get organized with the albums here for myself and I'm having a heck of a time. I wanted my build as one, next build as two, odd info as three, designs for others as 4, ... etc... I'm not getting there though. (it is probably organized too easy for me to understand. :-S