Moose do not fuck around. I was solo camping just off Death Canyon trail in Grand Tetons in September of 1998 and a bull moose appeared a bit up the hill from me and started bellowing and shaking his horns at me. I really had no where to go, so I pressed myself up against a small tree, no really knowing what was going on or what to do. Just then two female moose charged through my camp down towards the stream a couple of hundred yards away. After that the bull turned and wandered around me downhill.
Turns out I had set up my tent on a barely-visible trail that they were probably accustomed to using to get up and down the slope. I don't know if I was really in any danger, but I gained more respect for moose after that.
Ironically, I'd spent the entire hike that day worrying about a bear encounter, but the only time I saw a bear was from long distance, across the valley, a mother and her cub.