<p>Don’t worry about it. Seriously. 
If you wear a Hijeb and need to have time for the 5 daily prayers, that will be zero problem and may even be mentioned on your roommate match-up for accomodation. Some campuses will have an Imam on staff and/or you can check if the town where the college is located has a mosque. You can email various services, ask them about what’s planned for Muslims.
It’s very unlikely the food in the dining halls will be hallal but some colleges handle special requests and all have various vegetarian dishes for each meal.
However as MrMom said, justifications for intolerance or violence (ie., “it’s okay to make homosexuality a capital crime and hang gays”) or practices that enforce inequality, especially toward women (ie., Saudi women needing a “tutor” even if they’re adult, early/forced mariages in Yemen…), aren’t likely to be seen as acceptable. You’d have to argue convincingly and would have to expect vigorous opposition. However you’d also be entitled to these beliefs even if others disagree with you!
In short: all personal practices and beliefs (even chicken sacrifice and peyote smoking, depending on the place!) tend to be accepted on college campuses, but political policies that hurt groups of people using faith as a pretext aren’t likely to be easy to defend :).</p>