Are you only applying to one sem?
Any alumnae from your school, camp, etc. you can also talk to? Not that you won’t get good input here, but I hope you also speak to someone who knows YOU.
They’re both fine schools. Seminar is a bit more academic. CL seems a bit “realer” to me.
I don’t know about the 3 meals a day, I think you’re own for breakfast at CL, but otherwise you’ll get everything else on your list at CL.
(Disclaimer: I write this as a parent having shepherded kids through sem. Great experience with CL but not as recent as you want.)