The select 900D double layer + PU coated fabric used has the characteristics of good elasticity, strong firmness, and good durability, etc.; it is capacious enough to hold as many camping items as possible, including tents, folding tables, chairs, drinking tableware and other outdoor camping items, all in one haul so as to reduce the travel back-and-forth fetching them and create a relaxed camping experience. The trailer model can turn into a picnic car with the addition of a small table, thus being effectively a trailer and diner two-in-one.