Thinking about flying family from Hawaii to San Francisco or Portland for Summer 2012 to go on a road trip. What would be a good round trip route and attractions to see? Willing to drive as far east as Yellowstone. We have friends and family we are hoping to visit in Sacramento, Eugene, Vegas, and Aspen. But we only have a little over a month so we may have to simplify. Would like to camp as much as possible. Hoping to visit Redwoods, Crater Lake, Coeur dalene, and more along the way. Because the kids are between age 7 and 10 they probably won't be able to handle more than 4-6 hours of driving at a time. Hope there's some good advice out there. Thanks!