so a word of advice, if you see a yellow gold wing rapidly approaching you, particularly on the dragon, steer clear and DO NOT try to keep up with him....he's a local that drags hard parts and can cut through the dragon in one of the fastest times ever posted.
otherwise, weather is a crap shoot, could be ridiculously warm or rainy/chilly. You are in the valley basically, weather varies a great deal most trips. Late April though, is generally a nice time weather wise