Campgrounds offering free WiFiRV Forum member James Harrison created a listing all of the RV parks with free WiFi that James was able to find. It contains the park name, address, city, state, latitude, longitude and telephone number. If you import the file into Microsoft Street & Trips, the balloon will show the hyperlink that you can click on and get that parks website.
James only included those parks with websites that advertise their WiFi as free &/or those he was able to confirm via email offered free WiFi.
Download the following file and unzip.
A Draw layer file for use with Street Atlas and Topo is available by download the following file and unziping.
Free WiFi Draw layer.