My sister and brother in law left today from the St louis area for the Alabama coast. They will stay in there class C motorhome if its not too cold or a motel if it is. Was talking to them before they left about finding Gas open as they usually leave on new years day and they have never had any problems.
My Parents have both passed but they wintered in southern Texas. At first they would pull there camper down but eventually got a small car for gas mileage and bought a mobile home there. They never had any problems but that was maybe 20 years ago. Now is a different story.
To any and all traveling south have a safe trip