Advice on our next "big" vacation

[nvitalephotography]

The animals haven't been hunted and most have very little fear of humans. .

This is true but Rangers in the parks do intensive bear management work to try and keep bears from becoming to comfortable around people. (Im actually going to be interviewing a job, doing just that) While many in parks are still used to people and not fearful, they also will not attack you unless (like jrw said) startle them or get close to their cubs. Generally speaking if you are mindful that they are around, you have very little to worry about.

I also agree with the Bull moose comment. They have been known to charge trains and chase boats across lakes during rut.