Less is definately more!
Our team started out with 15 members + spouses + everyone else we knew there for the party. What a cluster, but boy did we have fun (especially when we were sponsored by a beer distributor and running a cash bar.)
We started into this in MIM competitions for our hometown contest back in '96.
Over the years as we got more dedicated to the competitive side of the event the team dwindled down to 6 core members. For the last couple of years our focus shifted to KCBS contests and the core group is down to 3+ a spouse or two. Sometimes the three of us are too many. This year we have only cooked together once, but different combinations of two of us cooked together 5 times.
Big teams lead to big headaches, there are always the friction of who is in charge of what, who does what and who is freeloading.