It's actually better that the college kids are home, since they are likely registered there at their parents' address anyway. It is important to make sure that people are registered in their home district, not thier school precinct. But, college kids don't usually change their registration/address to their college town.
It seems like some of y'all need to educate yourself on the Iowa process, it is not as straight-forward as you think.
I will write a thread/guide on it when I have time.
You can register to vote or change registration at the caucus site. Where people are registered to vote is not the main issue.