Paging Dr Howard, Dr Fine, Dr Howard... okay, back on topic... I have all of these below but I've not used them yet, and don't know if they are needed with the expansion of the Supercharger network. However, for the expenditure of $20 or so, you can set yourself up in all of them, and then pay nothing monthly and be ready in case you ever want to use one of them somewhere across the country:
Blink Needs CC
Chargepoint Needs CC
EVgo Needs CC $4.95
Greenlots Needs CC $5
Semaconnect Needs CC $10
It all depends on where you live and go. Look at some of the apps such as PlugShare and see what the chargers in the areas that you want to travel are. Also, some of the companies support non-members with just a credit card.
It all depends....
PlugShare is a must have. I have a chargepoint account (which I use daily), as well as an evgo and blink account.
I've never used evgo (they have evgo at the local malls, but the level 2 charging is free/doesn't need the app, and I don't have the chademo adapter). I have used blink exactly once when I signed up (to try the chargers at Ikea, which were terrible).
So... charge point and plug share + superchargers are all you really need IMO ;-)
There is a large void of SuC in north central Washington State. We used this one at the Pine Near campground in Winthrop WA on a trip thru Washington State and Oregon. It offered more kW and better food/drink options than the Tesla destination charger at Sun Mountain Lodge.