RoadShower 4G bolts to compatible crossbars and keeps four gallons ready on the vehicle. Its welded aluminum tank can be pressurized through a Schrader valve or garden hose, includes a 55-inch hose, and uses solar exposure to warm water. It avoids unloading a tank at every trailhead and Yakima explicitly mentions dirty paws, but it is expensive, adds 53 pounds when full, requires rack compatibility and installation, and has meaningful owner complaints about hoses and fittings.
