usa trip ideas - 1st leg

I'm going back to the US this year at the end of July for about 7 weeks. I have my route sort of planned out but it's the things along the way that someone may have seen that they thought was worth while which I may include in the trip. I'm going to break it up into 1st, 2nd leg etc so any info I get I can put into place.
We will be starting from Vegas, only there 2 nights, 1 full day, then we will go thru Zion and Bryce Canyon up past Salt Lake City and then into Jackson, Wyoming. 4 days for this bit after leaving Vegas.
I have been to the states 2 times before and I like to stay away from the cities. It's all the interesting things that make the trip worthwhile
If anyone has any ideas it would be greatly appreciated.
Thanks - chappy