Chris Landry, a former coach/scout who currently works as a consultant on coaching hires, said in a podcast that Campbell is either Nebraska's "#1 or #1A" target.
For what it's worth, he went on to say that Campbell is signaling interest, but Landry is unsure how serious it is. It could just be a matter of him getting his name out there to let other schools know he's open to moving for the right offer.
I regrettably didn't save the timestamp, but it's towards the end if you're really interested:
With the program at crossroads again, Veteran Coach/Scout Chris Landry offers some thoughts on how Nebraska got into such a mess and how they get out of it
landryfootball.com