We're staying in Scottsdale at the Westin Kierland for a few days in October. Unfortunately, most of our daylight hours will be spent in a conference. However, there is a short block of time (3:00 a.m. until 2:00 p.m.) available the first day. Is it possible to get from our hotel to the Grand Canyon and back in that time (and is it worth the rushed trip?) We've never seen the canyon and are unlikely to be back in Arizona anytime soon. Thanks.