I am not an attorney and what follows is my opinion only.
You are wise to notify all abutting property owners of your organizational meeting. According to the majority ruling in "Sunshine v. Brett", page 8, on our Resources page, owner usage has nothing to do with whether a property is benefited by a road:
...we conclude that any parcel ⎯ whether developed or undeveloped ⎯ that enjoys a right to use the private road is a benefited parcel.
If the majority of owners vote to have a statutory association, all benefited parcels will be members and will need to be notified of all future meetings and results of voting. Owner members may decide by majority vote not to assess owners who do not use the road.