Why are you heading to Sioux Falls for the night?
I highly recommend the Strategic Air & Space Museum. But, it is South West of Omaha almost half way between Omaha and Lincoln. The opposite direction from Sioux Falls.
Much of your trip up I29 will be in Iowa. You could check out this
web site to see if there is anything interesting to/fr SF.
Near Sioux City is the Lewis & Clark Interpretive Center.