A shelter including a support assembly having a plurality of inflatable supports each having an elongated tube body and defining at least two separate longitudinal passages pneumatically separated by a bladder, wherein the tube bodies of each support is connected to the tube body of one or more of the other supports and wherein each of the passages of the each support is pneumatically connected to each of the passages of the other supports, and wherein the supports are spaced circumferentially apart as legs of the support assembly for forming a perimeter of the shelter, and a single port pneumatically coupled to only one of the supports, the port configured for passing air between an external pneumatic vessel and the support to which the port is coupled and a canopy including a plurality of wall panels, the wall panels being configured for being suspended from the support assembly.