Well if there are 21 people and everyone is happy with doing one group with staying around the 160 baits for each person to make, we could do 2 types of lures each with 4 of each type of lure for a total of 168 lures. Or we could do 3 types of lures each with 3 of each type of lure for a total of 189 lures.
The second would be a little harder for me to do since I am only home every other weekend since I'm at college the rest of the time, but I would be down for the first solution I posted above if everyone else is happy with doing one large group.