Long story short, before the OP makes a decision, she (I'm assuming) should also investigate what it would cost to get a 1BR unit but only at Kidani Village or Bay Lake Tower. The 1BR units there have 2 bathrooms each, and the living room areas have both a sleeper sofa and a sleeper chair. The grownups can sleep in the master bedroom, the teens can sleep in the living room without having to share a bed, the 2 year old can sleep on the balcony
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or wherever the parents think makes the most sense. The OP would then also have a washer and dryer in room which means no afternoon needs to be set aside explicitly for doing laundry, you can keep doing a load or two day by day id necessary (and have the option of packing less, if you're flying that could save money on baggage fees). The OP would then also have a full kitchen, whether it would be used or not is a different question but at least there's a full sized fridge for beverages or left overs or treats you want to bring back home that are better off refrigerated as long as possible.
The only downside to that is, from my experience (your mileage may vary) using rented points to get a 1BR unit doesn't seem to get any sort of bang-for-the-buck savings like renting points for a studio provides. The reason being, while it often requires around twice as many points to rent a 1BR unit then a studio, someone paying rack rates (and presumably discounted rates) won't have to pay twice as much to get a 1BR as opposed to a studio. Example, going in late August, getting a standard view for a week at Bay lake Tower is 139 points for a studio, 268 points for a 1BR. Not exactly twice as many points, but close. Rack rates for the same time frame is 3066 for studio, 3808 for the 1BR (plus tax/fees). Renting those points at $15 pp, a studio is $2085, a 1Br is $4020. Now the rental price covers all costs (unless you pony up more money for daily housekeeping), whereas you'd have to add...what is it, 8.25% for taxes if you book a room without points? Clearly the studio is big savings, the 1BR is practically break-even.
And that's assuming you can't get a room discount, which you probably could. If you could get a 35% discount on the room for any sort of promotion, the difference between doing that and renting points is negligible, less than 100 bucks (AND you'd have room service every day for the extra money).
Disney World Problems = First World Problems.