You don't get any credit for the photos you take at Disney. They all belong to the company and I'm pretty sure you could get in massive amounts of trouble for using them. You might be able to get permission, but that is highly unlikely. It is definitely good to still talk about your work at Disney because it is important and sometimes a deciding factor in hiring someone. Photopass does a lot of intense training that is very important to take professional photos (I am an amateur photographer) and looks good to future employers. Merchantaining is good to talk up as well. Especially if you plan on a career where your knowledge gain from merchandise would be important.