We have boondocked in AZ for the past seven years. We occasionally add some generator time when batteries get low and solar is slow to recharge(cloudy days.) We run the generator for using AC and rarely in the morning to recharge the batteries faster when needed.
Note: Gas generators need to be run monthly under load according to the manufacturer. Avoids gumming up the carburetor and more. No need to discuss how I learned this with my first RV.......... thought I was being smart to not run it. NOPE. They are designed and need to be used. Monthly exercising run time is in your manual.