You may want to read the occupancy thread - it's a very heated discussion! Personally, I don't think you'd have any problem in a 1 bedroom. A studio might be a little hard - but even then - I know there are plenty of people who have even told the front desk there are 5 people, and they had no problem giving them a 5th key. With a 1 bedroom at OKW (where we stayed) there was a pull out couch that my 2 sons slept on, and right next to it was a couch that easily could sleep a 3 year old (even I was able to strech out on it). OKW studios have 2 queen beds, but the other resorts have 1 queen bed and a pull out couch - so it may be harder for you to get the 5 of you comfortable there. If you can splurge on a 2 bedroom,have fun - but since your youngest is so young still - I'm sure a 1 bedroom would wrk fine. Have fun!