Dick_B wrote:
This looks to be one big yawn for that age group. Have you considered asking them if they might like to make that trip? Seniors like mountain scenery with snow and big holes in the ground but teens?
I'd rewrite the trip and spend a week, or at least several days, at Cedar Point, the roller coaster capital of the world. You might also consider visiting many of the amateur baseball parks in your area. Lot's less driving and fun for all. Also any other theme parks within a day's drive. Do they have bikes? There is always the Erie Canal bike trail with a boat ride on the canal.
And ask the kids what they would like to do
There's no lack of kid-positive things to do in the area they're going to, though. The trick is to get them active so they're less fidgety when the long car rides come. The older ones might be very interested in the geology of the area, and everybody will like short hikes. Bryce in particular lends itself to that. Also, depending on what kind of water year it turns out to be, there may be river rafting opportunities. That's a GREAT way for a family to spend what might be an otherwise hot and uncomfortable day.