LJP who posts on here sometimes has a very good system for tourneys. It's points based and only one fish brought in. But they all trust each other. I've fished a few on Kentucky that were 3 fish and it worked out fine imo. It does allow for more "luck" than skill. Having 3 4# fish is a lot easier than 5 4# fish. In 3 fish tourneys I do like to see more in the big bass pot than usual.