A couple of hints. First, add extra 2x4's at the joints of the ones you lay down, to overlap the joints next to the other 2x4's, so the pipes don't fall down through at the joints. You said there were a couple of turns. When you turn, if you don't rotate the shed, the skids will be parallel with the pipe rollers. This won't work. You will need to nail on 2 more skids between the existing skids, making a box of skids that will allow you to roll in either direction. If the shed is oriented the way it will be when it reaches it's destination, then this will work fine, you just have to lay out the route and change direction at the turns by pushing a different side of the shed. If not, then either at the beginning, the end, or somewhere in between, you will have to figure out a way to rotate the shed to it's proper orientation. Does this help? Also check for overhead obstructions, wires etc. This works for pretty level sites, otherwise you may need a come along. Moved an 8x12 full house construction by myself on black iron pipe rollers but bigger diameter may work better. Need a lever that is strong with a long enough handle.
Bill