Plugshare you can use for free - no reason to sign up for it, unless you really need to borrow a charger from a private party. I think we're probably beyond needing that.
Depending on where you live, it does help having ChargePoint & Blink cards though. There's no monthly so it's not an ongoing expense.
Do you have a Chademo adapter? If so, depending on where you live, you may also need to use Aerovironment every now and again but they're a royal PITY. Their business model is monthly subscription, which seems to be to exclusively cater for Leaf owners who doesn't have chargers at home. So there is no real good way to deal with them except to make a phone call every time you're at one of their chargers. I really wish they would go out of business already and have their assets picked up by Blink.
PS: It's easier for people to correctly respond to you if you fill out at least your 'state' in your profile.