Steve,
Welcome to lovely CA!
For D3 you will be hunting a cross mule deer x blacktail deer. To hunt pure blacktails you will have to hunt the northern A zone and the B zones in CA.
For D3 you will find good hunting down to 500 foot elevation all the way up to 7k during the archery season. Check out F&G website for lands to hunt locally and go to blm.gov website to purchase a few BLM maps of your hunting area. It will show you what is BLM and NF. Get out now until the end of July for some scouting and you should do just fine.