The Private Ways statute has very little to say about how the internal matters of an association are to be conducted, only that:
The owners of parcels of land benefited by a private road, private way or bridge at a meeting called pursuant to subsection 2 may choose a commissioner or board, to be sworn.
Bear in mind, however, that under the Private Ways statute, the commissioner or board only has the power to carry out the will of the association as expressed by the membership:
By a majority vote, the owners may determine what repairs and maintenance are necessary and the materials to be furnished or amount of money to be paid by each owner for repairs and maintenance.
Meetings of the association may be called by the commission or the board, but they "belong" to the owners. The owners may adopt rules by which the meeting is to be conducted, and may elect a moderator to preside over the meeting. That moderator need not be the commissioner or a board member.
It would probably be a good idea to adopt Roberts Rules of Order as the controlling authority for the conduct of your association meetings.