They are making a great case for Monroe and that is a great option...however, if I knew of a camping area, I would vote Crescent simply because I like the idea of camping away from the city. Crescent is getting away, while Monroe is basically outskirts of Orlando.
I also like Talquin for the same reason I like Crescent...you're getting away where you can really see the stars at night. (hope you find a nice camping area, because it sounds like a great idea!)