Abstract: A tent-like enclosure structure is described. The structure is particularly adapted and constructed as an extension for and in combination with a van having a solid upward opening rear door; the top of said enclosure when in use to be held in position by and above the opened rear door of the vehicle. The enclosure has side and end portions, each of which portions extends from the top of the enclosure to the ground, and each of which enclosure portions is substantially trapezoidal in shape, with the top and bottom sides being substantially parallel to each other with the top side being the shorter side. Said enclosure also has a bottom floor panel, to the sides and end of which are attached the bottom edges of each of the aforesaid trapezoidally shaped portions of the enclosure structure. The combination can quickly and easily be put together by the typical users of such combination.