Thanks for the link John to the UCD site John. It looks like my area in Sacramento gets around 1k chilling hours on average, which honestly seems rather high (especially based on this current Winter season). Based on that, it would seem as if one could grow Northern Highbush varieties successfully here in Northern CA, as they only require 800 chill hours to set blossoms. That is per the following link:
http://www.homeandgardenideas.com/ga...ueberry-plants
--naysen