Well I see you are from the Carolina's. So if you don't want to drive 3,000 miles out west to see only the 'beginning' of spring, come on down to North Central Florida.
ALL the Snowbirds will have beaten feet back up North so finding a CG site will be a breeze!
I found an area with the most beautiful amazing blue springs around Dunnellon. Kayaking, hiking. Couple of real nice CG's in wooded areas too.
Crystal river is just a hop skip and jump from there with amazing sites to and the Ocean! I've heard numerous times that a CG called Rock Crusher is really nice and centrally located for a jump off point for all the Springs. And again places like Cedar Key right on the ocean will have tons of CG sites open that time of year.
Just be sure you get out of Dodge before May comes around. It's like God hits a switch on May 1 and it goes instantly from beautiful tolerable weather to death defying hot heat. :W