AYLUS Rancho Santa Margarita Branch’s Katie volunteered at Arroyo Vista Carnival on May, 17, 2019 Amanda Cai May 19, 2019 All Posts, Rancho Santa Margarita, RSM Comments On May 17, 2019, Aylus RSM branch’s Katie Zhou helped out at Arroyo Vista Carnival game booth, from 3:30 to 5:30pm. .