I see two options that I have used. I have not done that exact route, but jumping over to the 101 and hitting Gilroy (5 to 152 takes you right to it), or catching the 880 and using the factory SCs are both options. I do find the factory to always be full and therefore offering a lower charging rate. Gilroy always seems to have lots of empty stalls. I always find it quicker to take the east bay, 880, to get up to Petaluma, rather than 280 up the Peninsula, or up to the 80 and over. The new charger in Petaluma works like a dream and it not busy yet. I'm not sure, but the 5 to (what is it, the 580?) Manteca feels like a longer route to me.
And 224 mi for my P85+ would make me nervous. No matter what I do, I can't seem to get below a required buffer of about 25-30% for a trip. I could slow down of course (no way!), but I tend to keep it to 75mph, so not too fast.
I just came down from Petaluma to Santa Cruz yesterday. I did my calcs and charged to a 20+% buffer, thinking I was so smart. The trip planner said I would arrive back home with only 8% battery, which made me nervous, knowing I had a mountain to cross. So I stopped at the factory and took it up to 12%, since I didn't yet trust the trip energy calc. Low and behold, I got home with EXACTLY 12% left. I was impressed.