I usually have a pretty good idea of where and when I will be at a certain point. I use St. Brendan's Isle out of Green Cove Springs, FL (FL is my "home" state.) I look up a post off in the town I will plan to be at and call or email them the PO address. I get it the 3rd day, General Deliver.. USPO/strett adress/cit/state/zip. Has worked for 10 months for me. Price very reasonable to me. Some campgrounds will accept mail, some won't. I do the same with my mail order medications. Use General Del.. USP0, etc.