The thing with a 600 mile trip is any breaks are very costly. You stop around every 200 miles for a 5 to 10 minutes bathroom break and gas, and that's it. I eat in the car, I don't waste time getting food. (We split up so one person is fueling and the other going to the bathroom, then switch - but I do all the driving.)
If you stop for any longer than that and you start exceeding the maximum you can drive in one day.
> In fact, when was the last time you drive 200 miles without taking a break?
I do that multiple times a year. I drive around 400 to 500 miles, stopping just once (so at 250 miles usually). 600 miles is more rare, but I do that occasionally as well (and I would stop twice in such a trip).
I'm fine with topping up the electricity on such a stop, but ideally 5 minutes, 10 minutes max.