OP, judging by location, you're close to Peru State and Doane. Give them both a call and send them some film. Doane has a great program and plenty of tradition, even though it's expensive. Peru State plays in an amazing conference and has some exceptional new facilities/stadium. Its also the least expensive school in the state. And while it is difficult to earn a D1 scholarship from a Class C school in Nebraska, its not impossible. I can promise you your boy would be on the "radar" if he was a D1 caliber athlete.
The concept of a "scout"lurking in the stands isn't really a reality, but coaches talk at conference meetings and events. If any school has a D1 caliber prospect, the word will get out. There is no shame if you're not at that level
If your son is playing running back in high school, and runs track, keep this in mind. Virtually every Husker walk on DB or skill player Ive ever seen was some kind of freak in track. He would need to be among the state leaders in the 100, or 200, or 300 hurdles, or 400, or one of the jumping events.
Since your son is still a junior, he still has time to gain some D2 scholarship offers. NW Missouri State has been a major player in your area for the last decade. They really heat up their recruiting in the Spring of a kids Junior year. You can reach out to them and see if they are interested.
If not, I would certainly contact Doane and Peru State. If you're Catholic, I would reach out to Benedictine in Atchison, KS. That school is amazing from the campus to their facilities to the 5,000+ tailgaters they get per game. Its also not that far from your home.
Good luck to you and your son.