A tailgate enclosure for use with a vehicle can include a plurality of cross-members, a first upright, a second upright, and only one additional upright. Each of the cross-members can be vertically spaced apart from an adjacent one of the cross-members and can include a first beam, a second beam, and a central beam having a first end and a second end, the central beam positioned at least partially between the first and second beams. The first upright can secure the first beam of each of the cross-members to a first sidewall of the vehicle and the second upright can secure the second beam of each of the cross-members to a second sidewall of the vehicle. The additional upright can be positioned along the central beam of each of the cross-members between the first and second ends of the central beam.