Also, not trying to be mean, but would you really want 10 people in a space with just 2 bedrooms & I'm assuming 2 bathrooms? I know you said it's basically for sleeping, but still, that's alot of people in a small shared space. You wouldn't have 10 people living & sleeping in a 2 bedroom appartment. My family of 4 barely makes it when we stay in a normal size hotel room. We usually try to get a suite so there's more room. I can't imagine sharing a space with that many. As for Disney, as others have pointed out it's illegal, you can be kicked out, & because of magic bands, etc it's much harder to sneak in any extra people. I agree with the poster who suggested just telling your sister there's no room at the inn (so to speak) & to try & get a room for herself nearby. Less stress, more room!