First off, welcome to our little part of the WWW.
I do not cater, but would suggest you read through the multitude of posts in this section.
Some may apply directly to you in CA, others may just present questions you need to get answers to.
We have a couple of Brothers that cater in your general area--but it is the weekend and all of that. May take a while till they slow down.
Good Luck with your venture.
"Flirtin' with Disaster" BBQ Team (RETIRED)
FBA and KCBS Cook and Judge.
Former owner of a WSM, a Smokey Joe, a Charbroil Commercial gasser (junk), the legendary "StudeDera" and Sherman.
Now cooking with a Fast Eddy PG500
Proud Pellet guy cooking on real wood.