Another travel hack... never do the 1-way car for more than the time you need it. Turn it in and re-rent, or vice-versa. I once had a trip cut short in Kalamazoo, but I was supposed to go to Ottawa after that trip. I was only about a 3 hour drive from Indy (where I live) and I wasn't about to just hang there when I could be at home. I had a rental car for the week that I was in Kalamazoo, and of course when you call in and say you want to turn it back in Indy, they're like, "Welp, that'll be a 6 day one-way rental, that'll be $Texas". I turned the car in 3 days early at the normal rate, and rented a car for exactly that time that I was dropping off the car. They just let me keep the car I was in.
If it takes you less than a day to drive where you're driving to, that's how long you keep the car, regardless of how long you need the car.