Okay - I'll try to hit most of the replies. The trailer was/level so that wasn't the culprit. Propane was turned of intentionally - I only mentioned that fact as I didn't know if maybe the pilot light needed to be lit in order for it to correctly transition cooling control from gas to electric. I'm in Delaware. It's typically stupid humid here but the past week has been surprisingly dry.
But finally: it was an electrical problem. I got home late last night, fridge was still only slightly cool, and had to hook up and head out anyways and just faced the fact we would be stocking the cooler with ice. About two hours into the night at the campsite I noticed the porch light was "dim". I started checking everything again and finally learned the charger wasn't working. Checked across the lugs at the panel with my meter (battery disconnected) and then found another 40a fuse that is somewhat hidden - blown! Swapped it from my spares, hooked the battery back up, plugged back in to the 30a shoreline, and boom we were in business. This morning the freezer is 12° and the fridge is 35° - thanks everyone.
I will be looking in to why it blew in the first place. We just purchased it used (2011 model year) from a private party so maybe they crossed leads at some point?