when google it from my house (NE Lincoln) it has you going back up to omaha, straight up I-29 and straight west on I-90. I actually drove a good chunk of that section of I-29 today and there were some lane closures.
The other route it recommends (only 4 minutes longer duration) zig zags on some highways but it looks like it would be a decent drive. the majority of NE's highways are in very good condition and you shouldn't have any issues. Cell coverage may be spotty in areas.
Another thing you may need to worry about driving highways if finding premium fuel, if you need it. My parents took their Z3 on the back highways to Mount Rushmore and they had a hard time finding a place to fill up.
I'm guessing that created more problems than solutions, but something to think about. Hopefully Lightning will chime in with some more info.
'14 Tuxedo Black ST3
'13 Ingot Silver Escape Titanium AWD
'04 CD Silver SVT, #877, 1 of 135 May 2011 ROTM, FF11: Best Display, Best of Show; AFN12: Best SVT, Best Audio, Finest Five, Carlisle Nifty Fifty