put the fridge on LP aka propane
run the generator for 2hrs in the morning, during breakfast, just don't do it before permissible "generator hours"
run for 30minutes at lunch
again in the evening during supper "permissible hours"
the $2 or so a day generator charge will be nothing, compared to the rest of the trip
don't wait for the batteries to be dead to run the generator
the few hours a day regime is less costly and more efficient,
the TV or other devices should work from 12v or from a built in inverter which converts battery power to 120v
turn off the inverter function when not needed, be sure the charge function is ON
just remember fridge on LP, also some water heaters are LP&electric
use LP unless parked in a campground with hookups