Since the weekends are pretty much my only chance to ride, I'll do a non-rain dance and try to keep those storms out of this area!! It rained last year for the 150, too, but wasn't it also pretty cold?? Seems like it was the same weekend as the Beauty and the Beast in Tyler and we didn't go because of the cold, wet weather. Warm and wet are pretty tolerable...cold and wet are not! I've ridden in the rain (not heavy rain or storms) in rallies in those temps and haven't suffered too much. I just have a clear rain jacket...from Performance I think. The key is to keep the saddle dry before you start the ride...we use good ole Kroger bags if it's raining on our way to a ride. Once you are sitting on it, it doesn't get too wet, nor does your chamois. You will get the lovely brown streak up the back side of your shorts, but everyone will be sporting them. Not sure what to tell you about your shoes...in a one day event, it doesn't really matter that you have wet shoes at the end of the day.

Good luck!
Steph