I'm not sure about SD laws, but in Oklahoma, it is illegal to "party hunt". You are only allowed to shoot your limit of birds and are required to stop shooting afterwards. When I fill my limit, and I usually fill my limit before the rest of my party,I continue to work with the other hunters to help them, but do not shoot anymore.

A large part of the enjoyment for me is being out, but I won't lie, I enjoy making good shots and harvesting game. But the rest of the hunters also enjoy harvesting their own game. After limiting out, I take the hard jobs so that the other hunters get a better opportunity to take game (really I always take the harder jobs, because I am a little more successful).