Me too! I have one of those really loud storm whistles attached to my CamelBak along with a folding knife and my Spot gizmo. And I recently ditched the mini compass/temp thingy. My CamelBak is starting to resemble a flyfishing vest.
hmmmm, do you think that would hurt doggie ears? Have been considering a small air horn as I've had several dog owners strongly recommend this approach. The problem with Mace is the direction the wind is blowing...