Great idea for a shower on the van. Black PVC pipe with hose attachment. Could also use it as a mobile washing machine for clothes. Just chuck clothes in the end and fill with water and detergent while you drive around. Rule When staying at the beach
Anyone that has looked for an anvil recently, can tell you they are expensive. If you can't afford one right now, get creative. A section of railroad track, is a good (inexpensive) start. You could do what this person did , and add to it.