I would recommend 4 or maybe 2.
As a member of the HS class of 2021, my son choose his far away LAC sight unseen but it turned out to be a great choice for him. Some CCers might recall the lengthy “journey” post of a 21 parent who took her child all over the country going to colleges that weren’t even accepting visitors during the pandemic because of the presumed importance of the actual visit. Then the student didn’t even end up liking the college she chose. Before the pandemic, I did take my other student to the Boston area for a short fun vacation junior year to look at four colleges but she didn’t end up going to any of them.