The Roadshower fixes to the side of Yakima's car rack so you can wash off at campsite without sacrificing any packing space. We like this is a smaller version sized for 4 gallons of water, because we can fill it with a garden hose and pressurize it with a hand or electric pump. With enough pressure, the hose adapter gives a solid spray to wipe off all the dirt and campfire smell off of us before bed.