If you're planning on using I-10, and find yourself approx. 75 miles east of Tallahassee, we just stayed at
Suwannee River State Park a couple of days ago. I highly recommend it. The park staff was very friendly and helpful, and the campground was exceptional - very well maintained and quiet. If I recall, they have a total of 30 sites, all with electric/water/sewer hookups. The cost is $15 per night.
Main Page - Suwannee River State Park » Florida State Parks
Have a safe trip.