Sequoyah Bay State Park is one of the most popular places in the area on those hot summer days!!! They have many awesome camping spots to choose from, with or without electric and water, and at great prices! The camp spots have public restrooms available, as well as grills. If you get there early, you can grab a spot right next to one of their awesome swimming beaches.
They have very nice beaches for swimming, that are well maintained and patroled. A lot of people tend to want to head to the lake to drink alcohol, but they will not be allowed to cause problems, as they are so well patroled.
Sequoyah Bay is a great place for the entire family with it's great camping spots and all kinds of water sports available!