Do you have a set dining time? In that case you'll be assigned to one MDR and the same table (I think).
If you have Select, you can make reservations ahead of time. If you want the same server, you'd need to pick the same time for the same MDR and ask the first day if you can be in the same section if not at the same table.
Otherwise, you can make reservations for whichever of the MDRs you want - but you won't have the same servers.