While camping this last week at Huntington Beach State Park, SC I washed both the Monty and Truck. It has been almost a year since I have done both. I use Croftgate USA Wash N Wax, URL below (I have a 32 oz bottle I got three years ago, only used about 4-5 oz so far). Three cap fulls in a small buck of water, and you are good to go.
http://croftgateusa.com/component/hi...wash-n-wax8-oz
Watch the video to see how easy it is to use.
We got home, unload the Monty and took it to storage. Right when we got back from storage, it started to rain. I took a picture of my 2001 Ford Truck, right after it started to pour. You can see the water just runs off and beads up.