Being that close to a moose is somewhat dangerous. I have encountered them in Ontario's Algonquin Park and they like you say are big, mean and nasty. They are also beautiful. I will never forget watching out the cabin window as a child and watching a moose swim across a lake. It is something that was etched deep in my memory.
Bears are a different matter.
The only one I have ever been close to was in WaWa, Ontario. It was a black bear. I was out exploring the area. I was going up a hill when I saw the bear come over the brow of the hill. We watched from the windows while she cleaned the frying pan.