The greatest influence on running your RV generator will be the voltage available to the A/C when you start it. What is the voltage output of your generator when idling and when under load?
With an 80' run to available power at your house, the operating voltage at the A/C may be low or sufficient to run your RV's A/C. Without measurement, it is impossible to say, accurately. A hand-held multimeter would tell you whether your house power and an 80' run would be sufficient. For me, unwinding an extension cord is easier than deploying the generator. YMMV.
