Check with a
Florida DUI lawyer before you do anything, but I'll try to hit on a few of these questions.
First, yes, sneaking into a gated community without permission is criminal trespass, as long as it is properly labeled as "No Trespassing".
Now then, the prosecutor does have 60 days to reinstate the prosecution on the DUI charge. there isn't anything you can do about that, except pray that they don't prosecute you. Filing a speedy trial motion at this point will not help.
As far as your blood alcohol content, I believe you. An expert DWI defense attorney may be able to help you here. There are many situations where the BAC testing procedures retun false readings, or an expert may be able to show that the BAC reading was false due to your situation. You have a chance on this.
Good luck!!