Fish the finger canals north of alligator alley (i75). That is a prime spawning area this time of year. Look for ones that have a harder but compared to a muck bottom.
There are boat ramps over there to, so you don't have to take a long trip from holiday park. There is like 3 different boat ramps west of 27 for you to choose. Most trails that lead into the flats are marked with signs. There small but you will notice them. Like TWR said, make sure you have a orange flag min. 10ft high when going into the flats. You will get a ticket by FWC if they see you in there without one. Also I would not venture in without a GPS. You will get lost, it's very easy to. The mouth of those trails are good fishing to.