Vallemar is laid back and many families live there. It does have pretty good weather compared to other parts of Pacifica.
It would take you probably 10-15 minutes to get to 280 after going up Sharp Park Road, and another 20 minutes to RWC.
You might be best served by speding some time in Pacifica, going to open houses, and just hanging out and talking with some locals.
If you don't have an agent, I will be more than happy to put you in contact with some past clients. I don't want to step on anyones toes.