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you're going to be carrying those kids most of the time, so you need something to carry them in, or pull them on


One of these properly loaded to distribute the weight would increase your carrying capacity considerably. Balance the load to where you're just carrying a pound or two. Its easier to pull carts over any relatively large obstacles because of the direction of forces and because you can put your legs into it. BTDT with a hand truck loaded with firewood for years. I found out real quick it was easier to pull it onto the porch.