As mentioned, just plug into the camp site's shore power. A Tesla or other EVs need a 240 volt supply to fully charge overnight if the EV battery is run down.
Tesla Model 3 Standard Models need 240 volt/32 Amp and Long Range Model needs
240 volt/48 Amps supplies. You use the cord the car comes with. You can also charge with 120 Volts/12 Amp using the same cord but with a 120 Volt adapter plug but it's very slow. The issue seems to be how to tow it behind the RV. I believe Tesla says no as they are rear wheel drive or all wheel drive with no transmission with a Neutral. I would think a car dolly would work with a front wheel drive EV like the Chevy Bolt.