HI, I am new to the forum here and what a great site it is! I have never driven cross country before and my 56' Mercury wagon has no a/c, so Summer is out! I plan on doing a road trip from San Francisco to New York, back down to St. Louis, trying to follow as much of Route 66 as possible, heading West. What time of year and what Route as in 40 or 80 would be the best as in safest and weather wise ? I will probably do this in 2012 sometime. The main destination is to spend two weeks in New YOrk, do the siteseeing, go to Long Island,etc. Thanks!