If you're not in a campsite and just in the woods, it's however long you packed food and water for. Just remember to pack out your trash too!
I work here it's two weeks at Alexander Springs recreation area very nice just over $30 a night
In the rec area campgrounds, the max length of stay is two weeks. Salt Springs has a great campground with RV and tent sites! Juniper Springs is a nice one too, but no utilities in the sites
Not sure if you can camp there or not. I know it is worth a day trip and there are probably campsites nearby if not there
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