RE: Elk calling
They say you can't make a bad bugle....though sure sounded like my guide could.....haha.
So really the bugle if it sounds good/ok I don't think you should worry.
The cow calling is what I hear is more important to master....though IMO isn't very tough to learn.
I think you'll guide will want to hear you prior to any calling....otherwise if you wait til youre in the woods he may then tell you to stop....
Could be fun to do some calling sure, and if you have it down have at it, though your guide will probably want to be behind you...50yds or so, so you can get a shot, in which cas you calling wont be what you want to do, but ready case things change....could happen.
Have at it though, sure is fun!