Since I had a pile of chassis fans laying around from old work projects, I also used a 24V fan (running at 12V) to further ventilate that space. A 24V fan running at 12V spins slowly and makes very little noise. It's wired in parallel with the condenser fan and comes on when the fridge is running and blows in the up direction.
I also replaced the stock fan on the truckfridge with a much quieter unit since I am a very light sleeper.
I checked out your blog; you should consider spending a bit of time in Moab if you haven't been there. Arches NP is awesome, drive 10 minutes down the 191 and you are in Moab. Lots of cheap camping, plenty of free camping on BLM land for up to two weeks. An excellent place for 4X4, rock climbing, MTB, dirt bikes, river rafting, etc. You can rent dirt bikes, Razrs, jeeps, whatever you want.
Spring and fall are the best times as far as weather goes but that also means lots of people.
I've camped a fair bit in Moab and the surrounding areas so if you need suggestions just let me know. There is great primitive camping along the Colorado River on 128 and if it's hot you can camp at higher elevations outside of town.