Involving the kids is definitely a great idea. From experience, we traveled from SoCal to Fairbanks AK by vehicle when our kids were that age. While they didn't "love" the road, they knew that what they were seeing, they may or may not get to see again. My oldest told me this summer (she was 14 at the time of that trip) that she really enjoyed that trip. We always planned things that they would enjoy doing, as well as the adults.
Donna