Been on vacation for 10 days now. 4 total campgrounds. At first three, Fort DeSoto State Park in Clearwater, Fort Wilderness at Disney, then one in GA while hooked to shore power had no problems run...
I have run 2 A/C's on 30 amps but it was TIGHT and I mean TIGHT. (right at the long term trip point) It is not often you can do it.
You have to clean the A/C and basically run NOTHING else in the RV. and the park has to have good power feed lines (no aluminum) I'd give it a 1 in 100 chance or working or less.