If you only want to stay in sac, go to JOJO's for planted tanks, but if you are looking for larger peice of driftwood then I would go to Exotic Aquarium, and you can try aquaworkz just for soe fun.
yes these are great places! There is also aquarium depot, there isnt much in terms of fish but their products and supplies are cheap. Also if you go to sanfransisco check out albany aquarium, and if you want to go to a ADA store (their service isnt the greatest but they got cool stuff) go to aquaforest.
If you really want driftwood, try and contact plantbrain here on the forums. He is hard to get a hold of but he has excellent manzanita branches on the side of his house. He is here in sacramento.