Just thought I'd report back in. I visited Jackson Hole March 27-31. We had over 30 inches over the timeframe, each day with as few as 1 inch to as many as 15. It rained in the village on Saturday and Sunday, but snowed a ton up top -- very dense and deep snow. Got cold Sunday night and put 8 inches on top of the dense snow. It was unbelievable yesterday.
We did avoid the Hobacks and lower (anything below Thunder) faces the whole 5 days. Our routine was to ski high -- Rendevous, Cheyenne, Laramie bowls, and both the north and south facing faces of the ridges depending on time of day and snow cover. It was excellent skiing the whole trip. Base was deep. At the beginning of the trip, there was a hard slab underneath that rewarded the north facing faces. By Sunday, it was hard to find that layer.
We didn't ski the tram on Saturday or Sunday -- it was too white to have much fun (if any) in complete whiteout conditions.
A excellent trip, and one of the best skiing experiences I've had at Jackson. Personally, I can be happy skiing 5 days of Thunder and Sublette without the need for any additional terrain (except for that most excellent groomer: Sundance). Of course, afternoon laps at the end of day on Apres Vous are incredible -- skiing the slush/corn is almost as good as powder skiing. Of course, we didn't do that on the deeper powder days (saturday, Sunday, and Monday).
Again, Jackson can and does have great skiing in late spring. You just have to have the skills to ski the north facing terrain (Thunder, Hoops Gap, Tower Three, Paintbrush, Alta Chutes, Bivouac, Cheyenne Bowl, Wally World, Bivouac Trees, etc.). And if you get a bunch of snow, a lot of other terrain is fantastic. Our best runs were in the Expert Chutes.