I do lots of hiking/camping but fortunatley I live in a part of the world that hasn't gone over the top (yet) with environmentalism and I have yet to go anywhere that requires blue bagging. Im not picking up after the dog when out in the woods either. Of course im not letting her relieve herself on or near any trails either. We are often way off-trail anyway so leaving unpleasant gifts for other hikers isnt really an issue.