Thanks so much Klevan. I really didn't want to start taking things apart, especially lying on my back in the dirt wondering whether the baby rattlesnake who lives nearby might decide to cuddle up undersomething warm.
Things seem to be coming together in my mind about how this stuff works. (And I will give you a call.) I guess I just couldn't fathom that the gray water would just spill out onto the ground by design. When we used to camp in the Jemez in the Layton, I always used backpacking soap to wash the dishes so we could drain the gray water tank on a favorite little tree near where we camped. I guess a portable will be necessary when staying at RV parks. We actually got kicked out of an RV park in Colorado because our black water tank cracked and we had a bucket of cat litter under it.