求教San Diego至Grand Canyon的走法!RT,查了下,San Diego-Grand Canyon好像有两种走法:1. San Diego-Yuma-Sedona-Flagstaff-Grand Canyon 全程约578Miles。这条线风景如何,其中涉及到的Yuma,Sedona,Flagstaff是否值得逗留花时间转呢?各约多长时间?2.San Diego-Joshua Tree National Park-Kingman-Grand Canyon全程539Miles.这条线略短些,其...