That really depends on if you were a lead altar server or acted as a sacristan. Personally I would not consider simply serving as a leadership position. Leadership generally involves making decisions, setting direction, or providing guidance toward a goal. It is possible to serve as an informal leader through leading group discussions or heading up a service project.
Not sure how involved you are with Rotary International (assuming RYLA is “Rotary Youth Leadership Award”), but keep in mind that Rotary International supports positions in opposition to Catholic teaching. In particular they support providing contraceptives as a form of women’s healthcare to limit or delay child bearing. Just mentioning that since most people think of Polio eradication when thinking of Rotarians and you might be suprised if you were unaware of positions they support.