Central Florida Coastal RV Park Recommendations

I'm looking for recommendations for RV parks in central Florida, near either the gulf or Atlantic coasts, for the winter of 2020. We've escaped the midwest winters in the Panhandle the last few years and have been lucky with the weather, but looking to go further south next year to be sure to get some warm weather. We're used to the Florida State Park difficult reservation routine and haven't been able to get any state park reservations yet. So we're looking at private parks, but most seem to be full of permanent park models, or asking for commitments of 1 to 3 months. We'd like to stay 2 weeks on each coast to check them out. Our preferences are as follows: within about 45 minutes of a public beach, with water and electric hookups at least, and good AT&T cell reception. I have a liberal definition of central Florida: north of Naples & Miami, and south of Ocala. We have a 34' fifth wheel. We know we will pay a hefty price, but are willing to do so to get out of the snow! Thanks!