For now (until I convince her to come to Missouri with me), Directions to the Taco Truck are as follows:
Coming from Dayton, take Brandt Pike (201) north all the way to US 40. Turn right (East) until you get to 235. Turn left onto 235 (heading north) and go until you get to New Carlisle. You will turn left onto Washington Street, and the taco truck is parked directly on the left in the alleyway. You can park on the street. Tip: I would go closer to 11am or 1pm, as it can get very busy for lunchtime. Also, bring CASH, she does not take credit cards.