This is self serving...but I am headed to Fresno in May. Is it totally unrealistic to plan to fly into San Fransisco and drive to Fresno, then drive by Yosemite to Reno, and then back to San Fransisco? I have to be in Fresno anyway, but I've always wanted to see Yosemite, Lake Tahoe and the Sierra Nevada. I could even see spending a day in San fransisco if I can find a spare day. At the most, I have a week to do all this..if its even possible. How long would it tale to drive the triangle? Thanks for any helpful hints!