I have been snorkeling with my beard and never had any problems. I guess it is all about the gear you are using. When we had a pool I do some in different gear till I found the gear that worked. Might be an idea for you before you shave for the next trip!
I may just end up getting some goggles to swim with instead of a full mask.
Yeah, I used the mask that was under the nose and trimmed the moustache a little and worked great. Spent a week at PCB snorkeling and had no problems. It seals under the nose and works well.
Ya. It was leaking under the nose from the mustache. So that's good I won't have to shave it completely off.