Chico - I was talking about small LAC's like my son's. 94% of students where he is live on campus. Small campus, plenty of security people and staff outside, plus resident staff inside -- I think it can be done. Not perfectly but well enough. Clearly state schools with large numbers off campus are a different story. I'm glad my older son is done with UCSB -- tens of thousands of kids are packed into a tiny apartments and houses in a tiny beach town next to campus. Not a manageable environment.
BTW - have folks seen the recent news about the "pool testing" strategy being considered by the govt? It sounds like a potentially useful tool for schools of all levels and types.