I store my pontoon over winter in a storage barn with concrete floors. What does Bennington recommend to use as an easily movable set of four pontoon dollies with large swivel wheels so the pontoon can be moved easily around the floor. (The pontoon has ultralegs/sealegs. These make it harder to load using a scissors trailer. Thus, larger wheels are needed to ensure the trailer can slide beneath the ultralegs/sealegs.) Pontoon is a Bennington 2023 20LSR.