We just spent 4 days at Myakka. (Two other Escape 21's were there at the same time).
Myakka is a neat place. Lots of wildlife and fishing opportunity. Gators are plentiful. Boat ride and tram is good. Skywalk is interesting. Good place for bikes. Tends to be a bit humid compared to closer to the coast.
We were at Dry Prarie campground. It is older and pretty decent. Gravel and dirt driveway so kind of dusty. Shower house had a common dressing area that was a bummer.
Later I discovered Palmetto Ridge campground across the road. It may be the nicest campground I've ever seen. Huge gravel sites, wide paved roads with pedestrian bike markings, beautifull shower houses, some pull through sites and at least some sewer hook ups. It is sites 49-90. Dry Prarie is twenty something thru 48. I assume reservations for Palmetto fill early. It must be very new. If I go back I will try to get into Palmetto.