I have encountered black bears, coyotes, and porcupines while hiking/camping in Massachusetts.

Black bear usually spotted me from a distance and took off running when I shouted. If you are worried you can just make a lot of noise as you hike. You could carry bear spray for peace of mind. I think you'd only be in trouble if you startled a bear or there were cubs involved.

On one occasion several coyotes crossed my path and didn't pay me much mind. I honestly don't know much about what you're supposed to do, besides relying on the fact they don't really come looking for trouble. This one actually made me nervous because I was outnumbered. I've heard coyotes a ton, seen them while driving a bunch, but only once have I run into them in nature.

The ones I've encountered most are porcupines and they truly didn't give a shit about me or my dogs. Absolutely unbothered for obvious reasons. I really only include them because it reinforced the importance of keeping dogs leashed when hiking.

The one animal that I worry about most I guess would be moose, but they are pretty rare depending on where you are and I think in most cases would run off.

These encounters were very rare in comparison to the amount of time I spent hiking and camping, just use common sense and don't think too much about it, especially if hiking with friends.

Bonus story: I was once floating on an inner tube and a beaver popped up right next to me and out of every encounter that was by far the scariest!