This sounds like an ideal way to have some fun with your husband and still get that solo trip in.

I'm not familiar enough with Denver to give you any tips for there. I've only just driven through it. Didn't even stop for lunch.

I suggest you start a different thread asking for things to do in Denver and the new route you're planning. People might think this thread is just about your other, longer solo trip and might not see that you need help with a different itinerary.

Happy planning!