Charlie, your park fees are going to be dependent on a number of things: location, time of year, commercial or government parks, length of stay, and any membership discounts you may hold.
I've stayed for 4 days at a RV park in Townsend, GA for $25/day. 6 months later, same park, I stayed a month for $325/mo plus electric @ $.13 per/kwh. I've been in the Keys at the rate of $90/night for a few days. Best to travel the popular area during their shoulder season. Currently, I'm in an adult park on the St. Johns river about 450 miles south of ya. The rate is $350/mo FHUs with everything included except the clothes dryers. Yep, the washers, cable, and good working WiFi are included...lol.
State, City, and County parks in the east are running between $12-$28/night as a rule. The good State of Florida extends 1/2 price camping at SPs to it's residents at age 65. I got my Federal America The Beautiful "geezer" pass at age 62. It also provides me with 1/2 price camping at most Federal parks. The C.O.E. parks are outstanding. Last summer, I traveled from Thompson, Ga to Clemson, SC staying in C.O.E. parks along the Savannah River for 2 weeks at a time. Took me about 3 months to cover the 120 miles. With the "geezer" pass, my nightly fees ran about $11/night.
I'm content with over-the-air TV channels in the government parks. I carry a monthly WiFi plan with Verizon and augment that with a campground WiFi if it's up to snuff. All said, I budget about $500/mo for camping fees. When I was younger, I didn't mind boondocking for 5 or 6 days and blacktop parking overnight while in route to a destination was a given. But, I'm getting a little long in the tooth to maintain those habits. Hope this is food for thought.
