Yeah, I'm with everyone else on this. You'll get nowhere trying to build a consensus by committee, and anything you do manage to actually get going will be such a lowest-common-denominator compromise that no-one will enjoy it. And that's even assuming no-one in your group is one of those my-way-or-the-highway Sheldon Cooper types who will attempt to hijack the whole thing.
Plan something. Tell people this is what you're doing. Invite them along. If they try to change things, tell them they're welcome to plan a trip of their own and you might see them there if the trips overlap, but this is what YOU are doing.