If your heading to St Augustine try to get into Anastasia State Park (via Reserve America.com), park is on the ocean, sites are not, beach is great, sites are big, campground is one of the best in FL. Pleanty of places to visit. When heading north if you need a fast pull-through overnight spot try RVacation Campsite in Selma, NC. We hit it every year on our trip south and on return. Place is close to Exit 98 on I95, is clean and reasonable. Don't miss Williamsburg if you like historic sites. Spent 5 days there last Sept and found something to see every day. Don't know about camping there, as we stayed in a hotel. Have a great trip.
2007 Safari 25' FBSE LS
2006 GMC Sierra 2500HD Crew Cab 4WD Duramax