I've completed all but one of the achievements and have my Red Rocket settlement all ready to go to finish the last one. However, I can only find five of the six settlers that I sent there. I've tried using the bell and ran the entire perimeter and close surrounding areas, but they are no where to be found. I'm stuck at 93% Happiness and I don't think that it will be able to get to 100 until I find the sixth person and assign them a chore. Does anyone know a way to find this sixth person or should I just send a seventh there and add more food, etc? This achievement has been tedious enough and I just want to get it over with. Thanks for any assistance!