There was no reference to SoCal, but it did say they'll pay for travel costs and play at the highest level. If you squint a little, you can read that as travel to SoCal, but they didn't explicitly say it, nor did they indicate that they would travel south for the fall season.
I don't personally see any reason for them to travel to SoCal until they are consistently winning in Stockton, but I do not in any way, shape or form have any insight into how they are deciding where and when to play.
Text from the flyer:
This is an elite travel team that will compete in tournaments throughout the year. The
goals of the organization will be to prepare your daughter to play at the highest level in her
age group and ultimately to develop skills necessary to compete at the college level.
All expenses related to fees, uniforms, tournaments & travel expenses will be paid for by the
organization. This will be a first class, first rate team of the best that Northern California has to offer.