[Land Yacht]

I have found a local indoor storage facility, that the owner says has 3 Prevost and 1 Newell already stored there. The problem and question I have is around power. He said they supply a 50amp plug but only supply 20amps per circuit. Obviously, that will not run a air conditioner, but I thought I might run a portable dehumidifier since I am in the panhandle of Florida. However, I am wondering it that configuration will run my refrigerator and inverter/charger? Are both of those on the same leg, or can the system auto sensor somehow? The price is $200 per month less expensive than what I am paying now, so would like to male this work.

Thoughts?
Thanks
Mike