Tanks sizes?

Thanks for the suggestion, skipnchar. It will be a little difficult to do the timed water measurement, as the Coachmen doesn't have the open fresh water port that you just stick a hose in like most rigs I've seen. Instead, you use the same water connection that you would use for a city water hookup, but change the valve positions to fill the fresh water tank.

I already did the bleach thing, ed6713, but will also do the detergent on the waste tanks--good suggestion!