There also seems to be about a dozen campgrounds in Naples. Most should have a 50A hookup. If you need an hour or two of charge. I have a feeling that most of Florida is going to be this way. Lots of RVs and people vacationing year round.
Because KOA is easy to find.
Naples / Marco Island KOA | Camping in Florida | KOA Campgrounds
Not too sure how close it is to the event.
Good suggestion, but it will take some research to find those locations that are ameniable. Many of the RV parks in this area are exclusive gated community resorts. I did reach out to two of them and never received the courtesy of a response.
The KOA may not be a problem. It's about 9 miles South of the event towards Marco Island.
Larry