We've stayed about 20 minutes north of Bradenton in Palmetto at Frog Creek Campground. www.frogcreekrv.com  Hope this helps. Good luck!

We once stayed at the Encore park, called either "Sarasota North", "Winter Quarters", or "Manatee" by various Encore publications. We stayed on a coupon so it was fairly cheap for us. It was OK, a bit noisy since it right by I-75, but the sites were fine. You can sometimes get some good deals through their website, http://www.rvonthego.com/Winter-Quarters-Manatee-RV-Resort-CL20-8.htm.