If you have the time and find yourself in the Florida Panhandle… make sure you head to Santa Rosa island to visit Gulf Islands National Seashore to see Fort Pickens. This picturesque fort was built in the 1830s and named after a Revolutionary War general – Andrew Pickens. Fort Pickens has an interesting military and human history. As times changed, so did the military uses for the fort. Concrete gun batteries and other structures in the park reflect different periods of military history. Apache prisoners, including Geronimo, were held prisoner here in the late 1880s.
Vehicle entrance to the park is only $8 and your entrance receipt is valid for 7 days.
Gulf Island NS at Fort Pickens does have camping and can accommodate Big Rigs; however, you may have trouble parking at the fort itself. Although there are 3 or 4 spots labeled for RVs, you may find cars blocking your way. There is additional parallel parking near the fishing pier with an amazing view of the lighthouse.
For more info: http://www.nps.gov/guis/planyourvisit/fort-pickens.htm