I may be there doing a street shoot. Email me if you want to meet up. From Review Journal:

TREE LIGHTING AT FREMONT STREET EXPERIENCE featuring the annual tree lighting ceremony with Mayor Oscar Goodman, Councilman Gary Reese and Santa Claus at 5 p.m. [I'd recommend getting there by 3:30-4p]. Tuesday followed by holiday music with Candy and the Canes at 5:30 p.m. at the Third Street Stage, downtown between Main Street and Las Vegas Boulevard