We hope to stay in one of the studios at WL in March (not our home resort, so I have to wait for the 7 month window to reserve it).
We are a family of 2 adults and 2 kids (twins who will be 10). We stayed at BCV this past March in a studio and it was fine. We did breakfast in the studio every morning and had pop and snacks in the fridge for evenings. When the sofa sleeper is out, it takes up a bit of room, but we put it back into a sofa each morning and it was quite comfortable!
So I would think the studios at WL would be similar. I think you will be fine. We didn't spend a lot of time in the room anyway, we were out and about every day.
DJ