Well thanks for the repies.
the reason that I asked is that in 1998 (which was an unusually fair weather year I think) i climbed Sultana from late April till mid May. On the way up (say beginning of may) snow conditions on Crosson 6800-12800 were pretty darn good, but coming back down 12 days later or so it was awful wet sloghing stuff. and looking over into the NW basin on hunter we could see tracks totally buried by a big slough (after the climbers passed i mean).
i've wondered whether that was an unusually warm May, unusually sunny, or if West ridge or similar snow routes at 7000-12000 are a poor bet that time of year. i think my sense is that late april early may is ideal but sometimes your free time doesn't match up...and conditons probably vary enough that some June seasons could still be good and cold at those elevations, others not.
thanks for replies, mark