I was there 2 weeks ago and did the Zipper on Lanes Pk. Still loads of snow but at least the Stevens Canyon Road is open. We hit Lanes Pk early in the am, it was slightly above freezing with mashed potatoes snow. We used no flotation without any trouble but in the afternoon it would have been a different story.
Avy issues..... most of the "normal" spring slides appear to have already slid, at least on Lanes, but there was certainly some potential for more, especially (or obviously) during the heat of the day. But, being 2 weeks ago it is hard to say what is going on right now.
Let us know how it goes!