Travelitis,
It sounds like you really need a vacation. {{{{hugs}}}}
My experience has always been that the CMs at the parks and resorts go out of their way to help us and try to make our vacations special. The GAC will help facilitate that in a way, just by being an indicator that your family needs special assistance. It isn't just about lines and rides. Any time you are feeling overwhelmed or in need of assistance, you should ask. Also, know that the First Aid stations are wonderful places if you or your child get overwhelmed.
Take it easy... I hope you have a restful, magical, pleasant, healing respite.