Solar is not the way to go. Run the A/C and the batteries will drain quickly and then you have to wait for them to build up a charge.
The front compartment would need to be sealed off from the rest of the trailer and the generator requires air flow so you'll need to have fans with a fresh air source for the generator compartment. Like others have said you can get remote start Yamahas and Hondas but you still have to be able to put gas in them. So I'm not sure that is a solution with your condition.
If I was you, I would plan to stay in RV parks with hookups when A/C is needed and non-hookup parks when the temps are cooler.