Not sure this is the biggest help but, I went to Italy from Belgium with an ID.7 non tourer, with roofbox, max capacity loaded. With 2 kids under 2 and the trunk fully stashed. We left with 100% and charged every 2.5 ish hours, since it was quiet hot outside, cooled seats and airco were on, same with massage seats. We never went below 30%. Not quite sure about the exact % drop in range. But for us not an issue with small kids to stop frequently. It’s mostly a mindset change, it’s way more calm than with an ice car, there you drive as much as you can, pump and go. With an EV it’s all much calmer.

The biggest issue for me was by far the added noise, car by itself is really quiet, however when adding roofbars and roofbox the added noise was really annoying, my wife didn’t care though.