There is a small section with seasonal sites that are leased. Not sure about the procedure to get one but if you only need a week or 2 there a couple times a season then it's not worth a seasonal site. Tims Ford Lake is a great fishing lake and these people usually have boats and fish every chance they get. You will see when you get there. I like sites 60 or 70. They are full hookup. 61 and 62 are the only 2 in that inner section of the loop that are not FHU. Its a popular park so you better go on the TN state park site and reserve or you will not get in. I just checked the first 15 days in April and there are only 6 sites open. None are FHU.
Go on the Jack Daniel's site too and book your distillery tour and look at reserving a time to eat at Mary Bobo's. Really, you need to include eating at Mary Bobo's. You must make a reservation to eat there. They only serve 3 sittings a day and its a prefix menu but it is great food and a great experience.
Been to Dickel too and I did not take their tour. It is a very small distillery. They make a great whiskey too but I think the Jack tour is more impressive. If you are a veteran they give a discount. Take the Angel's share tasting tour.
If you are interested in aircraft there is the Beechcraft Heritage Museum in Tullahoma also so if you do go to Dickel you will be right there in Tullahoma so think about including that for a stop. It is interesting even if you aren't a pilot.
If you want to see a REALLY small distillery look up Prichards Distillery in Kelso TN. Its right off of 64 and easy to miss. It's in an old school house and they make some unique pleasures.