Can it be done? Best techniques? This is the light wind season so I hafta be able to get back home against a 2 kt current if the wind dies.
My best sprint paddle speed on the Getaway is about 2.6 knots. I would not consider paddling up current against 2knots a practical option. I can do 1.5 knots for long term. Does your boat have wings? If so you can bungee the tiller extension to an aft wing brace to hold the rudders centered. I found a stand-up paddle board paddle works very well for paddling from the wings. If you have crew you might be able to make way against 2 knots but you might not have crew after the experience.
In SF bay currents I'd be looking for a trolling motor and a li-ion battery.