You should be able to recharge at least 200 km of range in a 20 minute stop which is probably enough until your next break. An ICE lets you cut out those breaks but you really shouldn't because breaks are good for you (and your driving).
Either your car or whatever you use for GPS directions already handles the planning for you. It will automatically find and route you to chargers as needed.
You don't have to buy it and it costs you nothing. The sales people aren't sleazy either.
Just try it so you can speak from experience.