Aloha Mark!
No matter what you do from a title-holding perspective, you will still be bound by local land-use code and 'restrictions.' The very best thing to do is to learn to work with local authority, rather than attempting to side-step them from the start. You will learn they can be very beneficial allies in what you want to do.
If you are looking to sever ties to "grid" or "mainstream" mentality, I think you might find the widest latitude you can create might be to incorporate as a Church entity, which can have a non-profit/not-for-profit foundation in which to hold title to the actual land.
No matter on what you do or do not want the Commmunity to "dictate," you will need some certain guidelines established into incorporation paperwork.
because I don't know the legalese of your area, I'd HIGHLY recommend you invest a couple hundred dollars and have a VERY open, frank consultation with very good Land Use Attorney. They can help guide you to your communities best avenue of holding title.
as to "who to call" ..... contact the Nature Conservancy thru their website www.Nature.org. Also, check over at www.OneCommunityRanch.org and see if they have anything
online about legal structure. Jay Saboe is starting an
Intentional Community in Utah, and I'm 110% sure the legalities he has researched would apply to most (if not all) similar Communities.
~ Neil ~