I got into a very, very tight spot at Glacier (Apgar maybe) when I first bought my trailer. They were side pullout sites surrounded by trees. I got into one that I couldn't really get out of. Trying to make the turn would have put a tree into the roof of the camper. I ended up putting it into 4 wheel drive and putting the truck partway into a ditch to get it out, clearing the trees on all sides by inches. No damage done except to my pride but I am a bit more cautions about were I am with the trailer. I am also quite a bit better at backing up and knowing where the trailer is and how it is going to move, so that helps. I have a camera on the truck, but a trailer mounted camera would make it easier/faster if I were alone. Diesel stops have generally not been a problem.
