As an adolescent I lived in Alaska for three years and I had several encounters with moose. On my very first day, a neighborhood kid took me to a pond in the woods that had a raft that used old oil barrels for flotation, and there was a long pole to push it around the fairly large pond.

As we moved around the pond a bull moose was swimming across with his head and antlers sticking out of the water. The next time was on the golf course... and over the years they were a common sight.

One thing I remember, when you are near them you realize they are huge creatures...

Here is some good advice from reference.com

Moose generally prefer to avoid humans, but sometimes attack if they feel threatened. Cows with calves are particularly dangerous because mothers are very protective of their offspring. Bull moose become more aggressive during mating season, which occurs in September and October. Moose attacks are avoided by staying a safe distance from the moose and refraining from acting in a threatening or aggressive manner toward them.