Pack food before you go on a road trip.
Have everyone pack a sack lunch for the trip.
That way, instead of stopping in the middle of the trip, driving around looking for a place to eat, spending a bunch of time there, and then paying a hefty bill, you can just eat on the road or, better yet, stop at a nice park and stretch for a bit.
Plus, you’ll save a lot of money and a fair amount of time this way.