I was in a KOA and renting a Cabin... when I ask to plug my car on 50 Amp, they want to charge me 25 $ ( during the reservation process on phone, thay told me they eill " accomodate" me, but never mention a fee... I finally got it for 10 $ as I explain that I will never had stop there other than for the 50 Amp...
Lesson learn... make it very clear before your arrival.
On my way back home from Branson, MO this afternoon, I stopped by Meramec Caverns (Sullivan, MO) as well as the local KOA.
Meramec Caverns' campground offers $5 day use for 50A charging -- you can also use their beach, playground facilities, and throw a BBQ while your car charges. If you want to see the caverns, it's a cool upper-60's temperature (20 degC for non-Americans) in there, and it's not that expensive, and within walking distance. Overnight? $25 for an electric space. No cabins, although there is a hotel there that charges only $52/night. Rest in comfort while your car charges just up the road a bit.
On the other hand, when I stepped into the KOA office and asked about EV charging, I felt an immediate chilled attitude. I asked for their day rates if I just wanted to charge ($25). I asked if I rented a cabin, and a 50A space were available overnight, if they would throw it in (they wouldn't -- $25 additional charge on top of the $65 cabin rental). I asked overnight rates just to charge ($42, same as an RV with full water, etc. hookup). A bit disappointed, and I sent KOA some feedback about getting a policy established and more formally communicated with the community.