I have always found the trip out west to be very boring until the Rockies.
I-90 has Chicago
I 94 has Chicago + Minneapolis
I 80 has nothing
I 70 has trucks, trucks, trucks
I like to go across Michigan’s Upper Peninsula and take Route 2 across the top of the country. Stopping off at Teddy Roosevelt NP and a brief jog thru the Canadian Rockies (Jasper and Banff). Passport rqd.
Be sure to pick up a senior National Park pass.
I plan on heading out this way in mid august. Hope to be out of the country during Labor day weekend.