Tracked my gas and food costs on a 9 day road trip to Utah and came out at $31 a day
I kept every receipt in a ziploc bag the whole trip, mostly out of curiosity. Total came to $279 for gas and groceries, not counting the campsite fees since those were booked months back. What surprised me was the food number. Cooking on a little camp stove in the motel parking lot saved more than the national park pass did.
Biggest cost by far was the drive through Nevada, where gas jumped almost a dollar a gallon at one lonely station. I should have topped off earlier but I figured I had enough. Lesson learned the hard way.
Curious what daily number other folks shoot for on longer drives. Do you budget by the mile or just set a flat amount and hope?