In all, nearly 1,100 of the United States’ best 15-, 16- and 17-year-old boys and girls will participate at the camps, joining a list of alumni that includes NHL Stanley Cup champions, Olympic and Paralympic gold medalists as well as world champions. Notable former participants include Kendall Coyne Schofield, Declan Farmer, Patrick Kane, Hilary Knight, Auston Matthews, Josh Pauls and Maddie Rooney.