Hi,
it all depend. When I took the male pictures, I was at about 30 feets. I would not go closer to a male, particularly during the reproduction season (autumn). The female are a different story. I was at about 20 feet, maybe a little less. I always make sure that I have a way to protect myself (trees, rock), just in case. Last monday, I took some picture of a female and of her baby. The baby started to walk in my direction. He was just curious about me. He came as close as 10 feet, but I decided to backoff. Not because he was dangerous. I don't want the little one to think that he can get close to human, this could be dangerous for him if he ever cross the parc border....he could face some moose hunter.
Thanks for the comment !
Daniel