hello there!

I'll be visiting Seattle for 3 Months during the summer. Between Mid of May and June, I'll probably have 2-3 weeks' gap. After being in U.S. for two years, I decide to hit the road with my wife during that period(My wife does not drive).

My current plan includes a bunch of NPs on I-80, I-90, I-86:
Pittsburgh(start, May 12)
Cuyahoga Valley NP
Chicago
Badlands NP
Wind Cave NP
Mount Rushmore National Memorial
Bighorn Canyon
Yellowstone NP
Grand Teton NP
Crater Lake NP
Seattle(end, May 31)

Could you leave some comments on these stops? We are still planning for detail schedule. Right now we plan to focus on Yellowstone, Grand Teton and Crater Lake. We are sort of looking forward to a get-away-experience, so we prefer have the schedule looser.

I am indeed a little worried about my car, it's a Toyota Corrola 99, with 70,000 miles on it. It's current condition is good. Another thing is that will the time be good for crossing country? If possible, we'll try camping most of the time in NPs.

Also, I'll drive back to Pittsburgh in late August.

Your suggestions and comments are greatly appreciated!