I'm moving from NYC to the Bay Area, picking up my big Sis in Ohio who has kindly agreed to join me on a cross country road trip. I'm planning to take about 10 days, but that's not etched in stone. We'd like to see some nice scenery and stop in some national parks/forests and do a little hiking. Roadtrip USA recommends Rte 50, some of which sounds great, but friends have recommended going up through S Dak and Wyoming (rather than what they call the "boring" states of IL, IN, MS, KS). Would love to hear suggestions from experienced cross-country road trippers!