Napa river launch spots?

At the end of the access road off 29.
Past the golf course and park , the boat bock is shot but the apron is still usable.
Decent traffic to keep the riffraff at bay.

Cuttings warf is a good dock, cept for being unsupervised and the rifraff have free rein on your stuff.
The old boat shop was charging for access, but it's not public so a little safer.

Is this the place ?

Yes that's Kennedy