Good decision. With twelve people, you'll probably have more weight per boat than a 16 person trip, as there are less boats to divide necessary group gear among. We are poor and decided to stretch our budget with an 18 foot rental last March and we agreed it's the only way we'll do it from now on. The size is comforting, and actually will handle better than an over-loaded 14 foot boat. Plus you won't have to play Tetris every morning to try to get everything to fit in your little boat. Don't worry, it's not too big, it's really the perfect size. I would encourage others in your group to do the same so you're not the gear pig for a bunch of little boats.