Here is what FTW says about tipping. I agree with other posters, that it may be appropriate to show your gratitude to other people.
"There is a 'standard' somewhere which could be found on sites such as theknot.com or weddingchannel.com, however, these standards do not apply at Walt Disney World. With every cost, the gratuity is included i.e. DJ, banquet servers, etc. If you wish to give them something extra, that is completely up to you and the percentage is up to you as well."
I hope that this helps some people.
"There is a 'standard' somewhere which could be found on sites such as theknot.com or weddingchannel.com, however, these standards do not apply at Walt Disney World. With every cost, the gratuity is included i.e. DJ, banquet servers, etc. If you wish to give them something extra, that is completely up to you and the percentage is up to you as well."
I hope that this helps some people.