I'm working on some trip planning and I'm curious about squeezing a little more out of charging at a 14-50 outlet. From what I have read, as long as you are charging for under 3 hours, the NEC doesn't consider you a continuous load, and drawing up to 100% of the breaker rating is permissible (vs. an 80% limit of rating for continuous loads). This seems to imply that I could bump my charging rate up from 40A to 50A at RV parks etc. if I am just stopping in for a couple hour charge.
So, code books aside, I wanted to find out if others have done or do this and how well it has worked?