I just got back from my trip, and it towed great! It really didn't even feel like it was back there.
I tried the tow mode, though I didn't notice too much difference with it on or off. Braking with tow mode on does rev up the engine to help brake, which was kind of neat.
I actually ended up filling my water tank at home, as I didn't know for sure if water was available at my destination. For some reason I thought the water tank was in front of the axle, so I didn't want to add all of that tongue weight, but on closer inspection it sits right on top of the axle and extends toward the rear.
The 100W solar panel worked great, and I used it to charge both the camper battery and an external battery. I would run the fan all night, and I used the water pump here and there. The propane fridge worked great too! With this solar panel I could probably stay out there indefinitely.
2014 Rockwood A122BH
2014 Nissan Pathfinder