In general, you'll be around 20 minutes from the Angeles National Forest (ANF) which is just North of you. It's around 700,000 acres or so which leaves you just shy of 1100 square miles of hunting. They don't allow hunting in some experimental forest there (San Dimas I think) but allow hunting in the rest (majority) of the forest. It's currently a lead free zone but so far, lead free rifle ammo is less than $5 a box more. Turkey hunting shotgun ammo is a little more expensive. That should take care of your "day trip" hunting area needs.

If you can make it to the Tejon ranch, you should. I haven't hunted it but have driven past it and looked around on satellite maps. That is some good looking hunting country.

It will be a change for you but also a chance to hunt new areas and maybe use some different tactics. Chances are you'll never hunt through all of the country available but it's a lot of fun trying.