road trip planning

I have been working on figuring out my road trip back east. I will be driving from Seattle to Portland to San Francisco, through Death Valley area to the Grand Canyon. Then on to Mesa Verde and Colorado Springs. From there I'm not sure - what is there to look forward to in Kansas or Missouri...? Then Cleveland and the Rock and Roll Hall of Fame and on to New Hampshire. I've booked a couple of campsites and am continuing to figure things out - it was pointed out to me that campsites fill up in National Parks and such areas during the summer, which was a good point, so I'm trying to get it all together... Getting pretty excited for it.