E.M.
I noticed Fry YMCA on 95 th Naperville has a very good Safari summer camp program, join the family plans, we are members for 10years, I'm senior, Silver sneaker program is free, specially if you are Humana medical plan, young family have their own program.
YMCA is very family oriented. many local pools are manage by trained swim coach from Y during summer months.
I don't know much about Plainfield Y.