If we are staying in a studio does it matter if we have 3 adults and 1 child? I know we can't have more than 4 but wasn't sure if there was an age thing like when you stay at a non-DVC resort. My sister may be staying with us for 2 or 3 nights of our week long stay. I figure I'll need to get her a room key for the time she's there since she'll need it to do the extra magic hours. Does anyone know about this?