Last time I posted a WY snow photo - 11 days ago - the depth was maybe 22 inches. The above suggests today it's down to maybe 8 inches.
A quick review of the weather predictions for the next week or two suggest highs in the 50s. We should get continued decline in snow levels. Looks like our arrival before mid-May will be feasible.
An interesting factoid, a lot of our snow melt in the high altitude part of WY evaporates instead of running off. I imagine it zooming from frozen through the liquid stage almost directly into airborne water vapor. Having low humidity helps this process.