Anyone heading south before Dec.31 via I75 can enjoy an awesome Holiday Light display at the Kentucky Horse Park campground. We try to make it our first overnight stop on route to Florida. Details are here:
http://khpfoundation.org/Latest/southern-lights.html
Each time we have pulled in for the night to camp in past years, the staff at the booth just asks if we're camping (fiver in tow). If yes, they tell us to go ahead. There is only the camping fee that would be paid at the campground office. The lights were always throughout the campground perimeter. Someone may be able to comment on this years display.
Have a safe and enjoyable trip.
Dave