Getting the Itch for a Summer Road Trip

I need to be in Montana this summer for some video shoots and other job site visits. Was planning to fly the family out to Spokane and rent a car, but we're wondering if maybe we ought to seize the opportunity and drive the whole danged way.

This route would take us through Niagara Falls to Chicago where we could pick up Route 66. We could drive 'America's Main Street' to St. Louis where we'd head west to Colorado, then north to Montana.

The drive back could swing through Michigan's Upper Peninsula, through Ohio, and across Pennsylvania.

It's been about 13 years since Tinsley and I have had a 2,000+ mile road trip, and maybe time to really break in the kids (or break them down?)

What do you think?
What would YOU do?