[Theohazard]

I want to re-emphasize what others have said about a safety brief. I think that might be the single most important thing that will keep you guys safe (other than not drinking, of course). A safety brief will get everyone on the same page and it will encourage everyone to police each other. If you emphasize that anyone can call a cease-fire at any time for any reason, people will be much more likely to do that instead of keeping quiet for fear of looking stupid.

I've shot with groups of people where nobody took charge and everyone assumed that everyone else knew the safety rules. Luckily nothing went wrong, but I think that's a bad idea and I realize now that I should have spoken up and made sure everyone was on the same page, even though I was the one newcomer to the group.