I've mentioned before that I like to use Costcos as truck stops to fuel up, visit the bathroom, and grab snacks. Gas is always cheaper, restroom is clean, snacks are at a good price. What's not to like?
But planning a road trip, taking advantage of Costcos along the way, is too hard. I do it; but I think it could be simpler. Because there are no signs on the interstate, I'm often past the Costco turn-off before I see the store.
The Costco app should have a location feature that works with Google maps to let me automatically program Costcos into my itinerary. Maybe Google Maps can already do this. If so, I haven't figured it out. I put them in by hand.