if your group is registered for a magical or grand gathering there is polls available for you & your group that you can make & select with waltdisneyworld.com (disney.go.com) you might want to request some info & see if its for you. there is also special events available to mg/gg including a illuminations dinner at epcot, safari and dinner at ak & breakfast at mk.
we did a large family trip in 2000 for a group of 20, & most of the guests had gone to wdw previously we did a general poll on which resort, which group events & a family newsletter once all our details were confirmed about the group events planned. we also had free days, which i highly recommend just so everyone can relax & enjoy what they want at wdw on their own as well.
best bit of advise when traveling with family, friends &/or group, be willing to compromise.
hope you guys have a great trip at wdw!