When we went with 10 & we were told that we could be split but we were only split once at CP but the tables were right next to each other. and was eaiser for getting up & down for food. & Pooh & Friends could get to the kids better.
We've been split a few times too. We were split at the Plaza and at CRT. AT WCC, LeCellier, Coral Reef, 50s PT, Lib. Tree, Kona, Olivias, Turf and others we've managed to sit together. There's always a possibility you will be split, it just depends if there are enough tables they can put together.