It depends on the sand conditions. When the sand is damp and compacted it is pretty easy. When really dry and soft if can be fairly difficult coming back up.What is the trail's rating? Is it easy, moderate, ...?
When we were there a couple weeks ago we didn't have any issues.
Air your tires down to 20psi, go into low range, lock the center diff, go to sand mode in MTS, and keep your momentum up!