I still recommend the mask. One lip shot, or ear and you should understand what I mean. Wear whatever clothing you think is safe. Be advised that a Ghillie suit is about the same is a knight in plate armor. You are not going to feel most hits.
Sportsmanship is the key here.
Play next game. By the way, a cup is not a bad idea. Generally the game is played that if you or your gun are hit anywhere, you are out. If you are hit in the arm, you can't use that arm. Hit in the gun, you can't use that gun.