A lot of this argument is influenced by the level of team you are talking about. If you are on a team that is traveling to a different state every weekend, you're much more likely to run into conflicts, and need larger rosters. If it's the more typical B or C team, a smaller roster will work, especially because of the shorter and/or no travel. Maybe Player A can't be there for the Saturday part of tournament, but is good for Friday and Sunday. Extreme example, we had a player last season that had a family conflict for a morning pool play game, but made the afternoon game. Obviously, that doesn't work if the tournament is a plane flight away.