I'm also planning to do more person & pet photos at shows over the next few weeks, and thought I'd bring both human and cat-sized santa hats, a few ornaments, maybe some of that white batting that would give a surface that looked like snow, and the jingle bell collar. Will see what else I might find at michaels but won't go overboard with it.
Oh, on a other note, I got to photography the new "World's longest domestic cat" (according to Guinness) at a show in Reno, NV a few weeks ago.