I have talked with the right people and have it on good authority that UTV's (utility vehicles like mules and rhinos) may be allowed on about 80 miles of mixed use roads on the Ocala National Forest.  Check out :  http://www.fs.fed.us/r8/florida/news/index.shtml  to see where these mixed use roads are.  UTV's will not be allowed on ATV trails as they do not meet the definition of an ATV as defined by state law and by USDA Forest Service regulations.