South Florida gravel riding?

[MrCannonCam]

I'm going to be in the Ft Lauderdale area for a week in December. I am taking the auto train down from up north therefore I can bring my bike along. I'd prefer to stay off the roads, have seen a few things about Markham Park which is a short drive from where I'll be but no definite info on a rail/canal trail there. Any suggestions on routes, other things to look into? I don't mind just doing an out and back a few times but want to get on the bike and enjoy the weather while everyone back home is freezing their butts off or on the trainer..

On a side note I know about the LOST which I plan to ride on my way back up to Sanford to catch the train back home.