Has anyone done this? Placed a flat water tank on the storage platform in the crew cab when you may need to have extra water. Use a small pump to transfer to the TC tank when needed. If it was flat...
If you choose to use the 7 gal. jugs that Walmart sells ( I carry 2 ) It might be easier for you to fill the water holding tank if you add a deck plate. I did this and it works great, no more holding the water tank over my head or using a pump.