I'm planning a trip to California this summer and want to take a handgun. I know I can lock it up to get thru Illinois and Kansas. I've read that I can transport in this manner to anywhere, as long as I'm going from a state (IN) where I can legally carry to another state that I can legally carry. Which I can't in CA. But I'm unclear if I can leave it locked in the trunk and be legal. Any thoughts? Thanks.