Laurel Hill SP in PA.
http://www.dcnr.state.pa.us/st.....lhill.aspx

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Not that we've been to many here in Florida but we've been to a few but hands down Manatee Springs in Chiefland.  It's perfect for camping, canoe rentals, and what we like the most...there are 2 different scuba sites that we adore on site.

Doc

Peace River. Arcadia, Fl for Wilderness Camping. Trail Lakes in Ochopee, with or without power. 8)
Koreshean SP. All 30-90 minutes away. I work at Red Coconut so go there whenever possible for fun and fixing stuff. 8)

So hard to choose because there are so many beautiful state parks in Michigan. We really like PJ Hoffmaster SP and Platte River Campground in the Sleeping Bear National Lakeshore. Also, Ludington SP is great too. Hard to pick just one.

We have several state & county parks in our area that are very nice. Here is one of my favorites http://www.woodburyparks.com/l.....sioux.html
Only issue is they don't open until May 1st. I'm not going to wait that long this year  🙂

THis is a tough question.  We have been to many places in PA, and there are things about each one that we like.
I say my current top three are (in no particular order) Otter Lake CG, Prince Gallitzen SP, and Ives Run ACOE CG.

Otter Lake CG, in the Poconos area is a resort style place with activities, large lake, indoor pool, and hot tubs.
Prince Gallitzen State Park, near Altoona PA, Large lake, Modern Bathrooms, Paved roads, Bicycle park with jumps.
Ives Run Army Corp of Engineers, near Mansfield PA:  Large lake that's ok to boat on with gas motors, Beautiful views, and three styles of sites.  Full hook up, very level sites.  Elec and H2O up onthe hill over looking the lake.  Primitive,no hook up  sites, out onthe point away from the rest. 

Just back from 5 nights at Crooked River SP in St. Mary's vicinity of south GA. This park is nicely designed where river sites are private and large while the interior sites are great for larger motor homes and 5th wheels to maneuver easily.  Crooked River is close enough to St. Mary's and the Cumberland National Seashore to add some sightseeing into the mix. The campsites are mostly pull through, large or heavily wooded on each side, or out in the sunshine near the field by one of the two restrooms/bathhouses. There's even a small selection of cable channels for cold nights' viewing when the campfire burns down as well as a small and interesting nature center and gift shop. The boat launch has parking and is needed because water access is next to impossible on the park's bluff (campgrounds) with the steep and possibly dangerous climbs down to the "beach." We've now added this one to our "favorites."

A second favorite is McKinney Campground in Acworth, GA, where "our" rallies are held. That is a COE with nice facilities and a beautiful large lake. We rate it a favorite because of the scenery as well as all the fun we've had with camping friends and ralliers.

We also liked Vogel SP near Blairsville just south of the TN border. Again, the campsites were big. We found in the GA state parks where we've camped that the sites are large, more so than the COEs where we've camped.

All in all, Georgia has some awesome state and federal campgrounds. We have never stayed at a private park, so I cannot comment on any of those.

For me it would be Spring Gulch in Lancaster Pa.

My favorite seems to change every year as we always add a new one to our list of Alabama CGs.  But with that said don't know that we'll ever be able to top Gulf Shores State Park.  I've lived most all of my life and had never been until last summer.  Larry and I fell in love with the beaches and the campground.

We haven't found a favorite campground in our state (PA). In 1976, we discovered our favorite campground, in an adjacent state, and we tend to measure all campgrounds against it. Have not yet found any equal, let alone better.