Interesing, I see you have 3 kids and would require 2 rooms. I would think this would be the situation that would give you priority for connecting rooms over, say a family travelling with Grandma and Grandpa where it would be nice to have connecting rooms but not really necessary.
I haven't stayed at POP yet (less than 2 months to go

) but last year when I stayed at CSR, I really disliked my room location. I asked when I checked in if they could put me someplace else and was told no but that they were expecting a large number of checkouts the next morning. I returned early the next morning and asked again about a move and it was no problem at all! In fact, they gave me a bit of an upgrade (from standard to waterview)
It's certainly worth an inquiry if you don't get assigned connecting rooms at first. My advice is, return early the next morning to ask again if you want to try and be very careful about disturbing your luggage too much because you will have to check out of your room first, turn your bags over to bell services and wait for the next room to be ready (of course you are welcome to hit the parks and return at your convenience) It's a bit of a hassle (especially with the entire family I'm sure, I was travelling solo) so decide if it's really worth it
Good luck!!