That looks like a great list! You have a good mix of highly rejective schools and less rejective schools. And, you have a diverse set of schools in terms of ethos, which will help you find the right fit. As to finding schools where weekends are active, you can look at the overall metrics (size of school, percentage boarding, percentage international), which can be useful proxies. I think location can also be a useful metric to consider. My guess is that kids are probably less likely to go home from a harder to reach place like Mercersburg than a more easily accessible place. When you interview, you should also ask schools about the weekend activities they provide–both on and off-campus.
My daughter is at Hill, and they offer multiple off-campus trips each weekend. Some of them are cultural/educational while others are just fun (like the trip to Dorney Park this weekend or the Phillies game earlier in the year). There are also lots of things to do on campus during the weekend (sporting events, performances, movies, etc.). They also offer a regular weekend shuttle to Target and the nearest mall (King of Prussia, if you are familiar with area). Hill has a lot of kids around during the weekend, which makes sense since it is 75-80% boarding and everyone is required to board for at least one year.