Just finished adding a low profile lockable aluminum truck tool box to the tongue. I then added two group 27 106 amp/hr batts for a total of 212 amp/hr of of capacity. I also connected a isolation switch to the batteries. This allowed me to run EQUAL length battery cables to the switch which ensures equal loading across both batteries. With a flip of the swtich, I can isolate the batteries from the chassis. I then wired in two quick disconnects for my battery tenders. I can charge them independently which is better in the long run.
In short, no more disconnecting wires whenever I go to the storage building.
I also installed a Hengs fan upgrade in the bathroom. The friggin thing pulls the door shut when it's on.
