Wanting to book a last minute trip to Disney. There are 5 of us traveling, 2 adults, 3 children (7,10,13). Would really love to stay on property, however, we are traveling on a budget. My 7 year old is a very picky eater and it would not pay for us to book her with free dining. I can get a great deal on a value resort for the four of us with free dining. Is it possible to book for the four of us and purchase additional tickets for my 7 year old when we arrive. Also, the price I was quoted is for a room that sleeps four, is it going to be a problem to bring or request a roll away bed? How should I work this situation? (the 7yr old is an unexpected guest).