This community has been in Hobe Sound since I was a kid....! I, too, suggest that you contact the Martin County Sheriff's Department ( http://www.sheriff.martin.fl.us/sheriff.html ) to get the exact answers to the questions that you are asking. They are the law enforcement that covers that part of the county.
If you have any further questions on the local area, feel free to contact me--
Debbie Redditt, CRS, ePRO
The best source for this information is the local police department or county sheriff's department. they have access to the most accurate and current information and are generally very willing to be helpful.