You're welcome to stay at our place in SF, which is 1 hour 15 from Big Basin, assuming there isn't someone ahead of you on California Highway 236 going 18 mph, which often happens; 1 hour 30 in the latter case. About the same 1 hour 15 to Cabrillo. You are welcome to ride with me; I will be going to and from each venue each day. FB messaging or text work best, I read e-mail seldom and AP rarely, but will check this thread.