Wayne, watering lightly isn't going to be helpful for the tree. You need to water until the water runs out of the holes, wait a minute, and water again. That flushes the soil's salts, as well as bringing life-giving oxygen to the roots which is pulled in as the water flows down. Also, the root ball could dry out and the water would just run around it and out, if you don't use enough water each time. Roots use up the water around them.
It sounds like the tree could stay out. Babying them can be the worst for them. Read the species guide, and remember that Temecula isn't as cold as the area that these trees came from. Mulch around the pot so that the roots are protected.
Here is a compilation of overwintering discussions, it may reassure you and give you ideas about how to protect the tree.
If you can, attend a club. You're between LA and SD, and of course being a bit partial I do recommend the San Diego Club. We're an active, large club that meets the second Sunday of each month in the beautiful Balboa Park, which makes it so much more than a club meeting. You can ask questions there and get good local answers. Or join a club near you, if that is inconvenient. Whatever you do, seek out people that are familiar with your conditions and can help you. Plus, club members make great friends for nursery trips and things!!
Good luck, and welcome to the forum!
Joanie