An ergonomic ladder rack assembly mounted on the roof of a topper for a pick-up truck bed or on the roof of a cargo van, the topper having a ladder rack assembly mounted thereon, the ladder rack assembly designed to lift, move and return a ladder load between a stowed position atop the roof of the topper or van and a deployed position alongside of the vehicle. The roof of the topper or van has recessed areas formed therein for containing components of the ladder rack to thereby lower the height profile of the combination.