Wow, the performance sounds pretty good! I wonder if the fridge could "coast" through the night completely shut off? If it's down to 0-1°C, just shut if off, put it in the trailer and leave it till morning. Might not work in the desert, but in Canada... Also, I could add extra insulation around it on my slide. I wanted to make a nice veneered plywood box around the fridge anyway, I might have some room for 1/2" of foam or something. That would help too.
There just isn't room on the tongue for me to put it. That space is reserved for bikes.
I was looking at the trailer again on the weekend, and the space where the cooler would be is sealed off from the rest. A bit of caulking and... no problem. I'm sure I could vent that space and it would work out but... I'd still be nervous. The kids area won't be totally sealed off from fresh air of course, they will have a permanent vent, 3" dia, on the left side, plus a window they can open and close. The kitchen side is on the right side. I'd have Smoke detector, CO, and Propane just in case. But, trust me, I'm concidering this idea VERY cautiously!
6.1A on the DC operation, that's a little high. But if you figure you might only need to run DC for 8 hours a day... it averages only 2A over 24 hours which is comparable to one of the fridges.
I'd like to be able to leave the kitchen slide extended overnight and run on the propane, but I'm just worried about a bear attacking it, could probably do a lot of damage. Though I guess I need special consideration for bear country in any case. A determined bear could still do a lot of damage to the side door of the trailer trying to get in anyway.