The 501st Legion, The World’s definitive Imperial Costuming Organization, will be sending a garrison to the South Texas Collectors Expo with an appearance by Darth Vader himself! The 501st’s Mission is To Promote Interest in Star Wars, To Facilitate the Use of Costumes, and To Contribute.
From Article 1 of their Legion Charter:
…The Legion is an all-volunteer organization formed for the express purpose of bringing together costume enthusiasts under a collective identity within which to operate. The Legion seeks to promote interest in Star Wars through the building and wearing of quality costumes, and to facilitate the use of these costumes for Star Wars-related events as well as contributions to the local community through costumed charity and volunteer work…
As part of this Mission, the garrison will be accepting charitable donations for pictures. The proceeds will go to a local charity. You can find out more about the 501st Legion by visiting their website here.