I keep reading information about GAC. Two of my children have been recently diagnosed with muscular dystrophy (DD-10 & DS-12), plus my DD is on the Autism Spectrum. If you looked at my children you probably would not have known that anything was wrong but their muscles get tired and ache very easily. We are planning on going in March 2012 and I know it will be a busy time and I have been worried how they were going to tolerate it, especially the fact that they are too old for a stroller and therefore have to walk all over Disney. Can anyone give me more information about this card and how I can use it?