Is bear spray needed if we don't plan on doing any trail hikes? Just overlooks, drives, boardwalk areas, etc? The only one I've even considered is the new overlook for Grand Prismatic Springs and that depends on how far of a hike it will be. (Limited some b/c of an ACL surgery recovery that will only be a couple months out.) I had bear spray down on my list, but the more I read I wonder if it is only needed if you are trail hiking. Thanks!