If you prefer not running the generator as much then solar will help but you can't run the A/C from solar without major investment.
To answer another of your questions, we added 165 watts of solar last year costing about $200. Panel and controller was $175 from ebay which included shipping.
You'll still need the generator for the A/C, microwave, and wife's hair dryer.
We run 2 group 29 batteries, I think they are around 220 AH. We run a small fan all night, water pump, CO and LP detector, fridge, some led lights, charge 2 phones and 2 camera batteries, watched tv or a movie, and on the last trip ran the heat each night with no issues.
My full batteries top off at 12.7V and this type of use drops them down to 12.4 or 12.3V. The solar recharged them even with some intermittent shade.