The vast majority of charging was with slower AC chargers at convenient locations (while we were doing normal holiday things); the majority of chargers we found in car parks were where we would have stayed anyway. I’d originally ordered a Freshmiles charge card, but then discovered Octopus Electroverse has a partnership with them and charges directly through my electric bill rather than prepaying. Nowadays I’d likely use a combination of Octopus Electroverse and Chargemap (local info) to find pricing and likely serviceability.
I’d like to add, whilst I’ve mentioned the names of the charge point operators, all of them were found using the Electroverse app, and all functioned in a very similar fashion. Pop the card on the reader, the door opens, and you plug in. Tap the card on the reader again to disconnect and off you go!