Info that may already be known. But just in case.
I don't know if

qualifies or is registered with the State of California to conduct raffles, but in case it isn't, raffles are otherwise illegal in this state. My supervisor is the president of a local chapter of a worldwide M/C club and they are prohibited to use the word "raffle" in their fund raisers held in the State of California. They use terms like "give-aways" or "donations". Just the wording alone can make the difference of the legality. Maybe

is able to hold raffles in this state, but if it isn't, caution must be taken to not get the attention of those who might get their feathers ruffled especially when posting such an event in a public forum.
State of California info on raffles:
http://www.caag.state.ca.us/charities/faq.htm#raffle3