Looked up map qwest for Bunker Rd in Florida and didnt get anything promising, mostly Bunker Cove and Bunker Island...
Try finding the website for those military bases, most of them have an online directory for base services. Its possible that if its close to Eglin AFB it may be a vehicle training area or a munitions disposal site. Eglin used to be training/Testing base, or maybe that was Patrick AFB...
you can almost see a perimeter road around the "facility" plus it looks like all the trees have been cleared around the area