Yeah, we've done a few XJ runs on Dusy. It's a very scenic trail, but it's long, about 33 miles. It's best to run it in three days, but four is really the way to go. Ershim Lake is the best place to camp, and it's a great place to stay for a couple of nights. The trail is not difficult, most would say it's moderate, and you would want a locker and 31" tires minumum, and some rock rails.