If you go that way, don't miss Pioneer Village in Minden. It's worth a full day excursion in our opinion!
We lived in Nebraska near 6/34 at Cambridge. The highway is good, with light traffic usually, and you get to see all the small towns along the way... Many have interesting museums! Most of the small towns have a free/donation city park for RV camping, and watch out for farm equipment that frequently is seen on the highway.
Here is a link about the Cambridge RV Campground...
Cambridge City RV Park Information