My trip is complete, and here's what I learned and want to share with other west coast road-trippers.
First of all, I was very impressed with the availability and quality of chargers in Washington, Oregon and N California. A little thin in the eastern part of these states but still better than in many parts of Canada. Lots of chargers near the coast, generally. Chargers were often located in places that were OK to spend time in, unlike our infamous truck stop chargers in Canada. In all my travels I never once had a charger quit on my halfway through charging which was a nice surprise.
Hotels: Like GeorgeS says above many hotels have J1772 or Tesla destination chargers. Hotel chargers may not be visible on plugshare so call ahead. It's good to carry a Tesla to J1772 adapter since most hotels have too many tesla chargers and not enough J1772.
Shell recharge: RFID card worked perfectly every time. Order the RFID card a month before you go. They will ship it to Canada.
Chargepoint: RFID card worked perfectly every time. Have the RFID card shipped to an American address if you are Canadian. Chargepoint won't ship an RFID card to Canada, they only say they will.
Electrify America: Lots of these around. You pay by credit card but often the card reader didn't work. So it's a 5 minute delay to call the toll free number and get EA to start it. EA provided a free charge when this happened. Unfortunately no RFID card is available.
EVGO: RFID card showed up the day after I got home, nearly two months after I ordered it and tree failed attempts at shipping it to Canadian and American addresses. So I never charged with them. What a bunch of clowns.
EVSE: Were offering free charging with their app, so I decided to try it. Technical difficulties on EVSE's end prevented the app from working after multiple calls to their support line. Again, clowns.
Conclusion: Hotels, EA, Chargepoint and Shell gave me more options that I really needed. EVSE and EVGO weren't missed.
Tip: use the filters on plugshare to remove the charging networks you don't have access to.
Comment: I am bumfuzzled that charging networks who spend millions on their infrastructure can't figure out easy, reliable methods for payment to recover their investment. Is it that hard to put a card in the mail or get a credit card point of sale machine to work? I predict that the charging networks that become dominant will be the ones that work reliably and get paid painlessly. Networks need to realize they are selling a service, not a product, so service level is important. This comment applies to Canada as well.