With the exception of UCLA, UMass and the Canadian universities, I have visited all of the other campuses that are on the list above, and while I was not taking count or judging whether one is “religious” if they are of a non-Orthodox denomination, I will say that from visiting Hillels and seeing the student body, there was a definite Orthodox presence at all the schools above. I can also say that in several visits to schools like Goucher and Muhlenberg, I never saw Orthodox students despite there being a substantial Jewish population.
I am certainly not judging peoples level of religiousness…believe me I would fail miserably! But as someone raised in Brooklyn and surrounded by Jews of all kinds, I am pretty good at recognizing Orthodox students.
Just because there is kosher food, or a large numbers of Jews, it does not mean that the campus offers a daily minyan that is Orthodox (girls don’t count) and a large enough base of students to make the OP feel comfortable because she is part of a like-minded group.