If pulling 24 amps through a TT-30 or 40 amps through a 14-50 trips a breaker, then it's the host's fault for the campground having a shoddy electrical system, not the truck driver's fault.
Lol in what world? Campgrounds routinely have next to no funding, if they even have power pedestals I wouldn't expect them to be wired for anything more than an RV.
Approximately zero campgrounds have the capacity to charge more than one EV. They are sized for intermittent loads, just because it uses a 14-50 does not mean it is intended to support 80% steady draw.