While I'm sure the stray park has been wired this way...I'm also sure it's the oddity rather than the norm. No way it passes code.
If you are being up front and admitting to the owner why you are asking, no issues because then it's up to the owner to accept or deny.
But there is a significant concern with high amperage charging at RV parks, in particular during peak periods. Many parks struggle with just the RV loads. Many EV's pull a lot of amps and they pull them continuously at near peak load for the outlet for hours...standard code assumes not every plug is at max load, so the design of a circuit allows for less amps than what you would come up with if you added up each pedestal on the circuit.
And, if you are pulling 50amp-240v for 8hr, the kwh consumed starts to add up. One person does it, the park may not notice but if it was ever a significant number...
PS: solar is still no where close to cost competitive as you need to build a peaker plant to provide night time power (batteries are even more costly)...the way they manipulate the numbers is to give solar credit for 100% of it's output with no consideration of the need for base load power. At the same time they only credit the peaker plant for the power produced which reduces it's cost effectiveness...the peaker could happily produce power 24/7 and be far more cost effective. Be very careful who is providing you data as they usually have an agenda.
