Before going out to Castaic I always check their weather station online. http://www.castaiclake.com/uploads_upper/focl_w_new.htm
It will give you air temp, highs and lows, and most importantly wind speed and direction. It also shows you the wind speed patterns for the past 3 days so you can see if it's blown out or not.
I agree with the morning butter-- I love it there most of the time. But indeed it was blown out for the couple of weekends before Mem Day.
Looking at it this morning, it looks like it's been pretty sweet in the early AM. Maybe I'll see y'all out there tomorrow...