I would call your attention to two routes:
1> Stay on I-70 to Central City, then take 119 North to Nederland then 72 to 7. This entire route is designated "Peak to Peak Highway." It is a favorite drive of ours, even though it is far from straight and level.
2> The second route would take US 50 from Grand Junction through Gunnison and over Monarch Pass, then up to Buena Vista in the Arkansas Valley. You could even make a "spur" down to Ouray, then back up to Montrose to rejoin US 50. Many great places to stay along this route: Ouray, Black Canyon of the Gunnison, Gunnison itself, Buena Vista. From Buena Vista I would take 24 on up to Leadville (another good stop) then 91 to join I-70 and over to the Peak to Peak as above.
The second route is very scenic and has many possibility for campgrounds.