That museum is astounding!
I used to drive from Denver to the East Coast & back every summer. I don't know if they still do it this way, but it used to be guided tours only, one per day, M-F. I kept missing it. Then one year I looked in the window & decided I HAD to spend the night there & see it the next day... worth it!
Lincoln also has a blues venue that has featured plenty of top notch blues bands over the years, The Zoo Bar. & a good Cajun restaurant, Buzzard Billy's ( & I don't go for fake Cajun food! )