Get ready for exciting adventures at Mission Valley YMCA Camp Marston. Enjoy swimming, climbing, canoeing, and practicing archery while you spend your summer in the Julian Mountains. Build long-lasting friendships this summer at Mission Valley YMCA Camp Marston while having the time of your life!For your convenience, Everything Summer Camp has the complete Mission Valley YMCA Camp Marston packing list available online while you shop. Everything Summer Camp is stocked with camp duffle bags, laundry bags, water bottles, and all the other gear you'll need for a wonderful summer camp experience. For over 20 years Everything Summer Camp has been all about helping you get ready for camp. Give us a call if you have any questions. We would love to hear from you. 1-800-535-2057.