ED strategy for LACs (Williams, Amherst, Bowdoin, Middlebury)?

A Windows on Williams group is on campus now, and the participants are telling their freshmen buddies that they were told (by college officials) that about 90% of WOW attendees get accepted. Guessing Haverford might be similar, your child definitely should attend, because that may be a college to which she will be admitted, so she might as well see what it is like!