If one of you is under 3, then you'll have no problems. The WL only holds 4 people plus one under 3 in a standard room. As you say, you have 5 people, the only rooms at WL that hold 5 people are the deluxe rooms and the 2 bedroom units at the villas.
Thanks Soccermom, I was thinking that very thing. If the AP rate/code brings the rooms to $109 or $119, it would definitely be cheaper to get connecting rooms than one deluxe room. I'll be keeping that in the back of my mind while awaiting discounts down the road.