If you go down or up the I95 corridor I would strongly encourage you to stop in St Augustine, Savannah and Charleston. All three are very old southern cities and beautiful. They are very easy to access off I95, lots of history, lots of charm, lots of good food.
If you have the time, take a circuitous trip down. Come down(or up) I81 and visit the Smokies and the beauty of that area. Spend some time going down the Gulf coast of Florida. Lots of beautiful cities and towns, great beaches, laid back atmosphere in western Florida. Come back up (or down) I95 and see the Atlantic coast of Florida and catch the cities that I mentioned.
We go down I95 every February to get to the Gulf coast of Florida and we always stop in Charleston and Savannah, usually stop in St Augustine too. We love those cities!
James Island County Park in Charleston is GORGEOUS and has tons of amenities. Great walking trails, playgrounds, dog park, water park, etc. Good access to the city, good access to Folly Beach as well. If you go to Charleston, try to find time to go to Patriot's Point in Mt Pleasant. Its a military museum based on the USS Yorktown carrier, a destroyer, a submarine and a Vietnam artillery fire base. Awesome experience.
I've never stayed there, but Skidaway Island State Park in Savannah is often mentioned and people love it. We usually just stay for a couple nights and spend our time in the city, so we just pick a local campground that has vacancies.
We LOVE North Beach in St. Augustine. Its a little spit of land between the Tolamato River and the Atlantic Ocean. Easy access to the beach, easy access to St Augustine as well.
Not sure where you are staying while at Disney. Lots of people stay at Fort Wilderness. We went about 12 years ago and stayed at Tropical Palms and loved it. It is in Kissimmee right near Old Town, which was a really cool outdoor shopping area with good restaurants and bars. It was a pretty easy drive to Disney from there, they may have even had a shuttle as well.
Sounds like a really fun trip, enjoy!!!
