Welcome to the forum. My wife and I are fellow Texans hailing from Austin. If you have not opened your low point drains you might want to do that before tonight if you expect freezing weather to last more than a few hours. If you expect it to stay below freezing for a day or two you will want to purge your water lines and/or put RV antifreeze in them. Also, you will want to drain your hot water heater--open the exterior access door and remove the drain plug with a wrench.
Post here often and tell us where you are camping, ask questions, and send jokes!
Emeritus Member of Jayco Owners' Forum