Don't do it for uni - do it because you will enjoy it.
My daughter did Bronze and Silver out of school as school didn't offer it, then switched school for 6th form and they offered Gold. She already needed the volunteering for her chosen uni course, she went on a residential that also helped for uni application, she set a challenging goal for her skill and then they did a walking expedition. They had such a great time on the expedition that the same group went away and redid some of it again over the summer.