Hey Dan - this thread title keeps getting my attention. Would Spring or Fall be more appealing to folks? It's been mentioned that the desert heat is no joke during Summer. I can attest to that. Crossed it (twice) last Summer on the way to Monterrey (Leguna Seca Raceway) in July. We were prepared, but it still sucked. April/May or September/October would be my preference, but I realize there are lots of folks interested.