Don't look for this cache! It's not allowed as Yosemite is a national park. Sorry!!!
"There are three islets just above the bridge, which have never been given a name in Yosemite geography... I have named them the Happy Isles, for no one can visit them without for a while forgetting the grinding strife of his world and be happy." --W.E. Dennison, Guardian of Yosemite Valley, 1884-1887