Go high!
You can actually get some good sessions if you get out of bed early enough. Buttermilks would probably be OK first thing, as would some of the stuff around Tahoe maybe?
I was in Bishop just before Mule Days Celebrations (end of May) and was usually dossing in van at Buttermilks to get on rocks at first light, was not too bad esp if there was a bit of a wind. Could be OK really late in the day too.