1) More frequent but short breaks, e.g. literally a 3-4 minute break every hour. Just enough to fill up the tank, for someone to run into the bathroom etc.
2) If doing a long break (e.g. lunch with the family) do a 2-3 minute stop at a gas station before orafter, but for the stop itself drive 5-10 minutes off the main road to unwind somewhere for an hour on more.
E.g. I was recently driving through the Rheine valley, and had lunch with this view, which is a 10 minute drive from the closest gas station: https://goo.gl/maps/VVXTWQDkc2F48UHe8
If I had an EV I'd have been stuck with the family in some uninviting car park at that gas station instead, and instead of a nice lunch having to pick through overpriced gas station fast food options.
Re #1: I find that those types of stops happen at the beginning of trips. If you're only an hour or two into your trip when you need to grab gasoline, you grab it quick. But with an EV you should be charging at home or at your hotel overnight, so you start out with a full battery and don't need a charge until about 4 hours in. Once you're 4 hours into a driving day, you want to stop for more than 3 minutes.
With that in mind I think we've been optimizing the charging infrastructure in Europe for something that worked well in North America.
Since you are going to need a bit of a longer stop I'd think it would be equally if not more important to ensure that there's fast chargers at every restaurant & attraction that's a short drive from the highway, rather than blindly copying what works for gasoline powered vehicles.
Re #1: I didn't mean to do short pit stops because you need to, but, and particularly with kids of a certain age, getting them out of the car to walk around for 5 minutes every hour might work much better than a similar 15 minute break every 3 hours, etc.
Which is still a big advantage of combustion, since fueling itself takes 1-2 minutes you can more easily pick which stop is the rarer longer stop.
You don't use the bathroom or buy coffees? With a family, that'll kill your entire 20 minutes. Food or sleep will kill even more time.
And why the heck would you sit in your car while waiting? If you're driving in your car all day, a 10 minute walk every 3 hours will do wonders for your sanity and health. There's a reason commercial drivers are required by law to take a 30 minute break every 4 hours.