Florida practice tracks?

I could possibly heading down to FL to visit family, but I would like to ride a day or two as well, having never been.

I will be in the Port St. Lucie area [not exactly sure on the dates]. Thundercross from what I understand is about an hour and half away, but I also heard you can only ride on certain days for open practice. Any info appreciated.


Also any other tracks in the area?
Is there one called Mesa ?

I would hate to haul my bike down only to find out there are no places open.

Thanks