I graduated last may from U of I with a degree in Molecular biology and was pre med as well.
I cant say enough about how amazing of a place it is for not only reasearch opportunities but clinical exposure as well. U of I is one of the largest and best funded research institutions in the country and there is plenty of faculty that are willing to have students do work in their lab, and you get graded credit for it as well.
Also, Carle hospital on campus is the main hospital for central illinois so there are multiple shadowing/volunteering opportunities as well. Even as far as extracurricular groups are concerned there are many pre-med groups that will help you get connections,test banks and the like.
If you have more specific questions please let me know, but really is one of the best research institutions, has a medical school on campus and is walking distance to one of the main hospitals in central Illinois.