Welcome Clyde... Don't listen to Pariah. He is a good example of a MTB'er turned roadie. I hear he even started to shave his legs.
Keep you eye on here for the rest of the week as others get out there to ride and report. I haven't ridden in over a week waiting for a chest congestion to go away. But the equivalent is to avoid clayish trails. Most of the Alafia trails are that. We have WTA, Boyette, Carter, Croom, and Santos. Even San Felasco if you are willing to go a bit further up north. WTA (flatwoods, trout creek, and morris bridge) are closed. It was closed since last storm. With the 2-3 inches of rain from TS Isaac, it is a goner for the rest of the year. Boyette should be okay just try to avoid the trails in the back. Sidewinder, Canyon, Pandomonium. Alafia will probably not be a good idea. Carter is probably very wet and soft. I rode there 2 weeks ago and there were patches of mud here and there.
Your best bet will be Croom (long neverending flatish single track). The fund pits are clay trails and probably not very rideable. Santos will be another good choice but stay on yellow and blue trails.