Jim, don't dismiss sleds quite so fast. They work really well under certain conditions. They don't work so well if you have to go sideways on hills. They don't work so well if you have a narrow, twisty trail. They work really, really well if you are traveling over mostly flat ground like a frozen lake. They work well even for significant hills if you have wide trails. Even at 30 lbs or under, I'd rather have a properly packed sled for those conditions than a pack. I can go much farther with less exertion. Keep the weight low and centered and the sled won't tip.