Hi Raywen,
You might want to check with the MM coordinators about the availability of the Mega vip table. The usual custom is for the new couple to sit with the groom side as it symbolises the acceptance of the new family addition.
And usually for the dinner, the couple hardly get to sit down. Think only for the 1st 2 dishes, then we got to change into the 2nd gown and 2nd walk-in. After the 2nd walk-in, its picture time. Then follow by having the last dessert and standing-by for goodbye handshake.
Just to share, I had my rom last yr at another hotel with the round table setting. I had 2 vip table where I sat with my hubby's family. I personally think that its a better arrangement than to make the 2 families sit together as each family will feel more comfortable if eating with own members, can crack some personal jokes within themselves. And also coupled with the fact that the couple is usually not at the table, I think I would prefer my parents and siblings to feel at ease and joyful throughout the dinner.
These are just my personal thoughts and preference. You might want to think about them.