My wife and I are planning a trip to Disney World sometime in the next 18 months. She is skeptical because she has bad knees. Walking doesn't bother them too much because it keeps the blood flowing but when she has to stand for a long time, they really bother her. She has never been to Disney World and I haven't been since I was young. How long are the waits in line? Are there places she could sit while in line? Do ya'll have any other suggestions that might help her have a better time. Thank you all so much.