In all four parks where SWAMP creates and mantains trails, it takes months to approve new trails with either the State, County, or land owners. I know of trails in the planning that have been planned out almost a year ago. I belive the 3rd ear at Alafia was planned and approved closed to if not over a year ago. Because of the amount of volunteers we have there are only so many miles we can have of trail to mantain. If they keep adding more miles of trail, they need so many more volunteer hours to mantain them. I for one would rather have clean, well mantain trails then a bunch of new miles of trail that will never get clipped or fix because there is not enough volunteers.
Now, that does not mean that a drop/mount/jump can't be built on an existing trail. You can approach the individaul SWAMP people in charge of each park to see if you have any luck. Or you can go streight to the top (Wes Eubank). Individual Alafia (Art North), Boyette (Garry Rosseter), Morris Bridge/FW/TC (Ken Orlando), and Croom (Bob Wilcox).
You may find spots on the existing trails that you can use for what you are talking about. If you look hard enough, you will see spot where you can do drops. Is unofficial and I don't reccomand doing them but they are there. It may not be nice downhill and clean jumps like you see at the start of the Vortex in Santos. But if you just want to do a quick climb up a hill and attempt a mjaor jump on the other side, I know of some spots...
Alafia - This is unofficial pice of trial but it look like everyone is using it. ON the north side of hte bathroom as you are headed to rollercoaster or sandpine, there is a mount on the right side behind a tree. Another one on Bridges after Shelly's loop. Several sections of North Creek have quick mounts that you can use as pump track.
Morris Bride - As you approach the pits and go on the rigth side toward Gator Bait, there is Ant Hill that you can try.
Croom - Several on Drunken Mokey, the north blue pits, and several on the south red/blue pits. The Clay pit has a ton of jumps you can practice on. Even some major drop offs. Several sections of the blue trail have small rolling dips. These are motor cross style and a ton of fun to do with your bike.
As for building a "pump track" or wooden ledges style of track for practice in our existing sWAMP trails, I can just tell you, it will never happen. In my opinion, that is not what SWAMP is out to build since the majority of SWAMPERS do XC trails. They will never build anything that seems to be close to freeriding on the existing parks. Not because they don't want. But mainly because the land owners were our parks are do not want to deal with the higher libility issues this type of track/trails will bring.
As I said before, feel free to talk to the people I mention. I for one would come out to help and I am sure other will too. If you can't wait to get some quick BMX still tracks in. There is one in Dale Mabry that you can take your MTB bike to and try them. There is a small bike shop in Riverview building/planning a new BMX/MTX park down the road from where Boyette is at.