
to the DIS and the wish trippers thread!
I can tell you from personal experience and from reading dozens of TR's on here how it works at Disney World. The families are issued the special button at GKTW and the GAC. The GAC has a special stamp and comes in a special lanyard, so it is easily spotted by CM's. Some CM's see the magic button and it alerts them and they basically go from there and some CM's are used to asking for the GAC card and want to see that and don't really acknowledge the button. So, normally we keep both with us at all times.
As far as DisneyLAND - I can only tell you what I have read on here - and that is that buttons are issued from the MAW chapter before the families leave - other than that I have no idea.
We have had a few families come on the wish trippers thread and had wish trips planned for Disneyland, but off the top of my head, I can't think of any that actually did detailed trip reports. I will go back and look at the first post, though, and see.
Problem is - each MAW chapter is so different that it could be handled differently depending on the chapter.
ETA! I forgot about Devon! His mom did a great TR and it was a DisneyLAND trip. Here is the link:
Devon's Trip Report to DisneyLAND
It looks like he took the paperwork to Guest Relations and they issued a special GAC. And it sounds like LOTS of magic happened on their trip that was a direct result of them visiting the Wish Lounge and talking with the CM there. Magic happens on every wish trip, but they are all different - but I think I would make a point to stop by the wish lounge (because it is a great place to rest), but also to see if they can help with anything the wish child would want to do, people to meet, etc. Special treatment is not guaranteed, but you never know.