Question about adding celebration and online checking with aaa res

[Kidgoingon40]

Hi, I have a quick question. I made a room only res for bwi. We will be there for our tenth anniversary, so I would really like to have that added to our res. I haven't gone through aaa before, but I know to make changes to your res you have to go through them instead of Disney - does this include adding a celebration to a res? Or can I call disney directly? Also, can I still do online checkin? Thanks for your help

Oops sorry about it saying online checking on the title - iPad autocorrected it