@needscaffeine – I think that’s a tough call. Barring unforeseen circumstances, e.g. he gets arrested while visiting or the other guys on the team are totally unlikeable, at both weekends the coach will likely push to get him to (verbally) commit to applying ED to that school before he leaves to go home.
How big is the gap in terms of his interest in the two schools? If his preferred school is preferred by a lot, I think his best course of action is to visit that school first and try to seal the deal that weekend. First, there’s a small but greater-than-zero risk that if he goes to the preferred school’s later recruiting weekend, a faster swimmer in his event(s) (if there is such a swimmer – I have no idea how fast his times are relative to the team’s/conference’s best times) could commit to the school at the earlier weekend, resulting in the coach being less enthusiastic about supporting your son. Second, it’s safest for the coaches to commit to supporting kids who are most enthusiastic about their school, and whom they think are definitely going to apply ED (i.e., not change their minds after the verbal commitment). If your son attends the earliest recruiting weekend, loves it and is sure it’s the place for him, it will make a significant impression on the coach when your son tells him right then that this school is his clear #1 choice and that he will apply ED. Put another way, if it’s a strong preference he might want to do everything he can to wrap it up quickly.
If the two schools are pretty close in his estimation, with a slight preference for school #1, he might consider visiting #2 first. He can go there and see what he thinks. It might help if he is clear in his own mind prior to the trip that he will not verbally commit to #2’s coach until he also visits #1, as it might be tempting to do so if the visit goes well and the coach goes on and on about how badly they want him. Kids aren’t used to this sort of flattery/pressure, unless they’ve bought a car at the dealership. He should tell them whatever he needs to tell them to string them along until he visits #1 (hopefully soon thereafter) and then he should make a quick and final decision.
We’re in the midst of a similar process. It might be helpful if someone who’s been through this weighs in here.