I have one a friend gave me, when he got out of sledding, and it glides under either side of the belly pan with soft rubber pads, then you lift the bar and attachment of the lift at back and hook to the bumper. The tires are nematic, and will roll over gravel even sand and rough concrete. I find with newer sleds that have lots of suspension, that I have to place short pieces of 2 by 4 under the rubber pads to get enough height so both skis and track get off the ground. Once I accomplish that, it rolls around pretty easy and even my wife can move it out of the way so she can put her car in the garage..
The whole deal will come apart with two bolts and I can store it out of the way in 3 pieces.
Definitely get the biggest tire mover you can, and don't settle for hard rubber because the tires need to squash a bit to move over rough stuff.