We have moved heavy machinery by just placing pipes underneath and pushing. In your case you would probably have to place a couple planks under the pallets, and the pipes under the planks. The pipes roll with the movement. You would just have to keep picking up the pipes one at a time as it rolls off of them and placing it at the front, (careful not roll over your hand). You may need 6 or more lengths of pipe of the same diameter, and it would be best to chain it to, and push with some type of vehicle. Your small tractor may not be able to lift it, but I bet it will be strong enough to push it. Thats if you can get enough traction. If the ground is soft, or very uneven, you may have to place the pipes on wooden planks or sheets, so they would roll easier.