If you go back the same way you did last fall (down highway 283 through Kansas) I'd change it for you.
More than likely, I will.
I'm itching to go over around Rapid City, SD before I head south. I wanted to last year but decided against it. If I go, I might cut back over to 283 afterwards for a campground in Nebraska that I went to last year. It only adds about 125 miles. There are great campgrounds back over that way, so I think it's worth the extra $40-50.
If I don't go to Rapid City, I'll still go last year's route for said campgrounds.
I'm just trying to decide if I want to spend $150 in fuel to go to Rapid City first. That pays a cushy month of city RV park here with A/C running. Maybe if I go there in September, the worst of the heat will be done over that way. I've done spoiled myself having A/C this summer. I haven't had it in a couple of years. Now I don't want to do without it, at least for the rest of this year.