I would not worry if it's a younger buck. I've had quite a few deer spot me while on stand (even bucks and they've come through later). Since you didn't fire a shot I don't think you spooked it much at all. It will be a little more wary but I would say you will have a good chance of seeing that buck again. I've had the same young buck come by my stand four times in a season. It spooked twice but still came back to within 10 yards of me walking down a trail. If it's an older and wiser buck then it probably will avoid you. They seem harder to pinpoint anyway. Good luck in bagging him.