A carrier system for use with a vehicle to assist with handling cargo of the vehicle, the vehicle having a cargo bed at a rear of the vehicle and an opening through which the cargo may be removed from and loaded into the vehicle, the carrier system comprising: a carrier container including an interior storage space surrounded by a front side facing, in use, the rear of the vehicle, a rear side, a left side, a right side, a top side, and a bottom side, at least one of the rear, the left, the right and the top sides being an open side and allowing access to the interior storage space; a carrier support structure having a first end configured to connect to the vehicle and a second end connected to the carrier container, the carrier support structure being configured to hold the carrier container in a selected position relative to the cargo bed of the vehicle, the carrier support structure further having a height adjustment mechanism positioned between the first and second ends (76, 78) of the carrier support structure; a bridge device mounted adjacent to the top side of the carrier container and configured to form a bridge over a gap between the cargo bed of the vehicle and the top side of the carrier container, the bridge device having a width in its deployed configuration that spans, in use, the distance between the cargo bed of the vehicle and the top side of the carrier container; and a ramp having a first end configured to engage the carrier container and a second end configured to engage the ground surface thereby providing a sloped surface between the top side of the carrier container and the ground surface; characterized in that the height adjustment mechanism is operable to vertically move the carrier container relative to the first end of the carrier support structure and selectively position the top side of the carrier container relative to the cargo bed of the vehicle. a carrier container including an interior storage space surrounded by a front side facing, in use, the rear of the vehicle, a rear side, a left side, a right side, a top side, and a bottom side, at least one of the rear, the left, the right and the top sides being an open side and allowing access to the interior storage space; a carrier support structure having a first end configured to connect to the vehicle and a second end connected to the carrier container, the carrier support structure being configured to hold the carrier container in a selected position relative to the cargo bed of the vehicle, the carrier support structure further having a height adjustment mechanism positioned between the first and second ends (76, 78) of the carrier support structure; a bridge device mounted adjacent to the top side of the carrier container and configured to form a bridge over a gap between the cargo bed of the vehicle and the top side of the carrier container, the bridge device having a width in its deployed configuration that spans, in use, the distance between the cargo bed of the vehicle and the top side of the carrier container; and a ramp having a first end configured to engage the carrier container and a second end configured to engage the ground surface thereby providing a sloped surface between the top side of the carrier container and the ground surface; characterized in that the height adjustment mechanism is operable to vertically move the carrier container relative to the first end of the carrier support structure and selectively position the top side of the carrier container relative to the cargo bed of the vehicle.