A method of loading a cart into an enclosure, according to various embodiments of the invention, comprises the steps of: (A) providing a cart having a first end and a second end, the cart comprising at least one swiveled wheel adjacent the first end, and at least two non-swiveled wheels adjacent the second end, the swiveled and non-swiveled wheels being adapted to facilitate the rolling movement of the cart over a surface; (B) positioning the at least two non-swiveled wheels on a wheeled platform so that the non-swiveled wheels are supported by the wheeled platform; and (C) while the non-swiveled wheels are supported by the wheeled platform, and while the at least one swiveled wheel is disposed on a support surface adjacent an interior portion of the enclosure, using the wheeled platform and the at least one swiveled wheel to roll the cart into the interior portion of the enclosure.