We have had no problem with Service Dogs at
Disneyland. We are there monthly with 2 in tow. Note it on your reservation when you make the reservation. Request a room near an elevator. Best morning potty spot, go down the main elevator, cross the lobby and out the doors by guest relations.
Disneyland is relatively easy with a service dog (one that is properly trained.) Be forewarned. There are MANY untrained "service dogs". We've had our dog lunged at and barked at.
We do rider swap for rides the dog cannot ride. I will wait with the dog while my daughters ride, then my daughter will wait with the dog while I ride with my other daughter. There is a dog kennel for the dogs at the rides with heights that the dogs cannot ride. We will not use them. It is too easy for someone to get to the dog. We have seen kids feeding dogs in the kennels popcorn. We prefer to swap.
Since your daughter is just getting the dog, discuss this with your graduate team coordinator. They may have rules on what they feel the dog can ride.
We will be there during the same time frame (at the DLH). If you see a pretty brown golden lab cross or a black lab, say hi!