John, Go to Dale Hollow Lake in (mostly) Tennessee and (partly)Kentucky. Rent a houseboat and spend 4 days on the lake with about 620 miles of undeveloped shoreline. Playing cards, fishing and drinking is about all there is to do, but if you can stand a totally relaxing get away such as this THIS IS THE PLACE.
Caveat: Unless you take me along to cook your meals and bring you your drinks your friends who like to be waited on will be disappointed.