I haven’t tried my local university yet - I’ve sort of ignored the area previously, figuring that if it wasn’t “off limits”, then it was probably hunted pretty hard and not worth the time. But I have seen another detectorist hunting one of the large open areas at the school in the recent past, and it’s had me re-evaluating the idea of trying it. If we ever get s decent amount of rain, I’ll probably try it once the semester ends at the end of November.
In general, I think that the type of college or university plays a role in the decision. In my case, the local university is a public institution - to me, that means it’s no different than a public park, and unless the university has published rules expressly forbidding metal detecting by name or has posted areas restricting access to the general public, I’ll personally feel comfortable assuming it’s fair game - just like a public park, it’s possible that the groundskeepers or the campus police might ask me to leave, but I know that’s the worst that might happen. I haven’t been asked to leave a park yet, and I suspect it would be no different with the university. If the university is a private institution, that’s a different animal, to me - that’s a “no hunt” without some sort of official blessing. If groundskeeper John Fescue says “Sure, it’s not a problem”, it’s a go - but I definitely need a legit name and title to use in case I’m approached.