I plan to leave for San Francisco on april 2. My bike is having the 10K service done and new tires put on for the trip. I have even broken down and bought rain gear. My time limit is roughly a month for the round trip. A southern route seems to make the most sense. I am looking at taking US 45 down to US 70 and follow that path to Arizona. I plan to head to San Diego via Yuma then up the coast. Any tips or suggestions?