If you decide to split your group, be sure to designate someone other than yourself to manage the first ADR, or else the system won’t let you book an overlapping ADR for the second group. Or, you and another member of your party who has their own
MDE account can coordinate, one booking for part of the group and the other booking for the other part - this takes close coordination, letting each other know what time each ADR is so they can get as close together as possible. (Some reports of success with this method reported they were both seated at the same table, working on separate devices!) And when you have your ADRs, make sure everyone arrives at the restaurant 10-15 minutes before the earlier ADR, check in with the CM (not via mobile), and tell them you’re together and would like to be seated as close together as possible. They’ll do their best!