I don't mind hitching at any angle, but I avoid UNHITCHING at an angle because doing so would leave the trailer tires twisted. (That's with tandem axles.) Once in Florida during a rainy spell, I backed into a muddy unpaved site and had to have someone with 4WD help rescue my F350. On hitching up to leave, I backed the F350 in at a 90 degree angle over ground that wasn't too soft.