the bigger issue you are going to have is getting a table for that size. With a set dinning time like early or late, they already know what size table you will need and will be prepared for it when all of the cabins is linked up. your time dinning is not really good for this and you will be waiting a very long for a table. you also need to make reservations in the app and your group can be separated at different tables when they randomly assign a table
if your entire group is listed in your hub, you might be able to make one reservation or you will need to need multiple reservations
the best thing to keep the late dinning and then when you get onboard the ship talk to the matrie d about switching your group to early