Even if your tent has a floor, the ridges in a truck bed can make for a bumpy sleeping surface, so you’ll need to make it more comfortable. A piece of plywood offers a quick fix. Just lay it in the bed under the tent, then use your normal camping pad or air mattress inside. Metal truck beds can also stay uncomfortably hot or cold, depending on the temperature outside. Give yourself a layer of insulation by using a piece of carpet under the tent.