A larger university would provide the ability as you said "to blend in better," but at the same time, a smaller college would provide many of the same things. The school I attended had around 2000 to 3000 students, and mainly the other students showed up to attend classes. There were groups that were geared toward students' interests, but most of the students in my classes didn't really interact with the rest of the class as a whole (interacted with the teacher, but not so much the rest of the class). I can say that the smaller class size (30 or so students as opposed to more than 100) made it easier to gain the professor's attention just in case I didn't fully understand the lesson being taught.