Still sounds like plenty of time to settle down and each lunch.
After 4+ hours of driving, taking 30 minutes to grab a bite to eat, go to the bathroom, and walk around before getting back in the car for another 4 hours sounds about normal anyway. Regardless of whether I can fill my car’s tank in 5 minutes at the gas pump, my tank still needs something in it and my knees will explode if stuck in a car for that long without a stretch.