Technically, I would think the best way to make this work in MLS is to make all the YW members of the Laurel class. You can do that easily enough by going to Organizations > Laurels, then click Add Members and select all the Beehives and Mia Maids. Then once they are all in that class, you can select any of them to be members of the presidency.
Many questions are already answered on the LDSTech wiki
. Check it out!