Iamom, Are you thinking one room with your family of six? I have never stayed at Swan/Dolphin so I am not that familiar with the setup but I didn't know you could fit six. If you were having to do two rooms I would look into renting DVC points as Boardwalk Villas and Beach Club Villas are in the same location and are great Disney resorts. Since you are a family of six, but with real small children, I would think you could fit in a one bedroom. And before anyone flames me for this, I know of a family with children similar ages who put six in a 1 bedroom. Disney will give you a crib for the baby and they said if you can fit the people in the room no problem. BUT they won't give you an extra bed or bedding. SO you may want to think creatively about putting the three older kids in the king bed and you and hubby on the couch and the baby in a crib. Or the 7 & 3 year old on the couch and you and the hubby & two year old in the king. I know lots of people have said they bring small blow up beds for children around 3-6 and put it in their room. They are called something and are very easy to bring but I can't remember. Either way, you will have more space in one of these villas.
You would also have the advantage of having a kitchen and large bathtub for the kids to bath in. YOu can definitely save on breakfast and lunch by using the kitchen. It just depends on your style. It is something to consider. November is a low month for renting points so you could get a one bedroom for as low as 18 points a night. Depending on who you rent from you could pay from 8-12 dollars per point. You might get lucky if someone is trying to get rid of points before they expire and since the trip is not too far away people will more likely sell at a lower rate. We have done this and find this a great way to stay at Disney's deluxe without paying anywhere near deluxe. We never pay more than $10 per point but your budget may be more flexible. Also, that is the rate. No tax on top so if you pay10 per point then you would be paying 180.00 per night.
Also, not sure if Swan/Dolphin still charges the $10 dollars for the "activity" fee per night so don't forget to factor that in. Also friends of ours paid the 25$ per night as well for the 5 th person. This starts to add up and their entertainment rate of 139 ended up being $180 before tax. They went DVC instead and paid less for bigger accomodations. I only suggest this because you are going in a month that has a low point value.
sorry so long. I just like to suggest to people with small kids because I know we get kinda crazy without the extra room. If you are interested check out the DVC forumn and go to FAQ and/or rent trade board.
Good luck and happy planning.
oops forgot to mention:: The weekend rate Fri and Sat are ridiculous in points so you may want to consider pop century for the first two days. Disney will move you over to the new resort, I believe. Anyways something to think about.