The GAC will be marked with your arrival Date, and departure date, it will also put how many people are with you and will be good at all 4 major theme parks.
Please make sure you have spoken with reservations and have a wheelchair accessible cabin as not every cabin has a ramp available to it for use by those in wheelchairs.
Taking breaks are a great tip, make sure you stay hydrated, and if you stop at the Baby Care Centers in each park they can be a great place to take a break for quiet time, and if you need any help in terms of family restrooms for easy of restroom stops, or if she needs to lay down etc.
Most of all go in knowing that you won't see everything that there is to see, but letting the magic happen makes the trip, most people could say "I rode X 5 times" but you will mostly remember down the road "My DD went to the
MK and Mickey did >_______ and she was the happiest little girl" So just go with the flow and let her lead the way, so that she stays entertained and engaged with things.
Have a Magical Trip