I am planning on visiting the flagstaff/grand canyon area in 2 weeks, and have to get back to denver to fly out 6 days later. what is the best way to take for the best experience, up through utah and over to denver, or cutting through new mexico and up through colo? i will be traveling single with 2 kids (10 and 12) and am leaning towards new mexico, native american country partially because i want to take them white water rafting on the way back up through colorado..(arkansas river seems closer that way) is this ample time and what are the best things to see? i don't want a whole lot of hours in the car because my kids fight.. also what is the best part of the grand canyon to see?