A vehicle trailer system for loading, transporting and unloading a load, comprising a trailer including: a trailer front structure ; a pivotable structure , arranged rearward of the trailer front structure and pivotably attached to the trailer front structure, the pivotable structure comprising: an elongated main body extending along a front-to-back, longitudinal direction, characterised in that the pivotable structure additionally comprises: a transversely-movable structure carried by the elongated main body at a rear end thereof, the transversely-movable structure selectively movable relative to the elongated main body in a side-to-side, transverse direction perpendicular to the longitudinal direction; and a set of wheels coupled to the pivotable structure and arranged frontward of the transversely-movable structure; wherein the trailer is movable to adopt: a first configuration, in which the pivotable structure is supported on a surface by the set of wheels and the transversely-movable structure is in the air; and a second configuration, in which the pivotable structure is pivoted rearward relative to the first configuration, the set of wheels is in the air, and the pivotable structure is supported on the surface by the transversely-movable structure. a trailer front structure ; a pivotable structure , arranged rearward of the trailer front structure and pivotably attached to the trailer front structure, the pivotable structure comprising: an elongated main body extending along a front-to-back, longitudinal direction, characterised in that the pivotable structure additionally comprises: a transversely-movable structure carried by the elongated main body at a rear end thereof, the transversely-movable structure selectively movable relative to the elongated main body in a side-to-side, transverse direction perpendicular to the longitudinal direction; and an elongated main body extending along a front-to-back, longitudinal direction, characterised in that the pivotable structure additionally comprises: a transversely-movable structure carried by the elongated main body at a rear end thereof, the transversely-movable structure selectively movable relative to the elongated main body in a side-to-side, transverse direction perpendicular to the longitudinal direction; and a set of wheels coupled to the pivotable structure and arranged frontward of the transversely-movable structure; wherein the trailer is movable to adopt: a first configuration, in which the pivotable structure is supported on a surface by the set of wheels and the transversely-movable structure is in the air; and a second configuration, in which the pivotable structure is pivoted rearward relative to the first configuration, the set of wheels is in the air, and the pivotable structure is supported on the surface by the transversely-movable structure. a first configuration, in which the pivotable structure is supported on a surface by the set of wheels and the transversely-movable structure is in the air; and a second configuration, in which the pivotable structure is pivoted rearward relative to the first configuration, the set of wheels is in the air, and the pivotable structure is supported on the surface by the transversely-movable structure. <EOS>