Just for giggles, I charged my 2019 Nissan Leaf SV+ from my trailer. It was just a 110v AC connection. The sun was out, middle of the day, maybe a little hazy. The 640 watts of panels (mounted horizontal on the roof of the trailer) were producing about 550 watts after I cleaned them. The remaining load came from the 560 Ah battery bank, which started at 100% state of charge. I stopped charging the car after less than three hours when the battery bank got down to 39%. I think I got maybe 10 miles added to the car.
The point of the test wasn't to actually charge the car. I was stress testing my Victron Multiplus 12/3000, which came through with flying colors.
To really charge the car in a boondocking situation, I would need a lot more PV (like three times what I have now) and an inverter that produces 220v AC at 50 amps.
Campgrounds are eventually going to get wise to EV charging. Many of the older campgrounds likely have an electrical system that can't handle the load.