We have recently started riding with our child in the Burley trailer and he seems to do fine for the first 5-6 miles or so. After that he usually falls asleep and starts to fall to one side or the other. We have been putting him in the middle seat and try putting a pillow in on one side for him to rest on, but sometimes he falls to the other side. Do other people put their kids in the side seats, I don't really want to load the trailer up with pillows, but want him to be as comfy as possible. And yes he is wearing his lap belt and 5 point harness.