We did SD and WY in 2016 and CO in 2017. Your itinerary is fairly aggressive but you’re going to be on a lot of great roads in SD and CO. We went to Crazy Horse’s place but it was a rip off in my opinion. Save the bucks and get a photo from the road.
Deadwood has a ton of small casinos and the historic district is a fun place to walk around. They do re-enactments of gunslingers shooting it out in the street several times a day, and there’s always “interesting” people walking around. The super 8 is a little further south from the historic district, but I think they have trolleys that your can ride into town for a small fee. In deadwood, go to the top of Mt. Moriah and see the graves of Wild Bill and Calamity Jane.
Pikes Peak will be cold at the summit. It was 36 / wind chill 26 at the top near the end of July last year. Mt Evans will be about the same.
We did 4 corners just to say we did it, but it’s pretty lame too. Mesa Verde NP near Cortez has the cliff dwellings, which are about 20 miles in from the park enterance. The park poiice run radar on the road leading to the cliff dwellings so don’t go blasting thru the NP.
Million Dollar highway was great... Just avoid the sheer cliffs with no guardrails. Black Canyon of the Gunnison is worth seeing also.
Sorry for the long babbling post. Mrs Wahoo and I may go back to CO either in 2018 or 2019. We loved it there.