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One thing I notice in this list - you don't give yourself a lot of time in some of the stops - such as Deadwood, SD - is about 12 hours, if not more, from Minneapolis.
Another item - San Diego to El Paso, about 13.5 hours.
Are these times (number of days) inclusive or exclusive of traveling in between destinations? I look at the list, and it definitely appears inclusive for 49 days. So, in situations like the one above, you will have little to no time to actually explore the area you are arriving in.
At this point you may want to redraft your outline, as there are some significant driving days in there.