When I take short trips like that, I put in enough food on the day I leave to try and last the time I'm gone, fill up the water dish, maybe add another and put lights on timers. I have never had a problem. If that makes you too uncomfortable, have a friend check in on him.
I'm on a 2 night 1.5 day trip right now. (Left Friday night, back Sunday evening). Everything Barb just said. A little extra food, and as long as your lights are on a timer and your heater on a thermostat, your tort is going to be just fine.