So basically it seems like most folks just dump and not flush. From all the folks we camp with meet at campgrounds this seems to be true. On Sunday's while at full hook up spots I notice how quickly neighbors dump and head out. Rarely do I see anybody flush and have only seen it once or twice at a dump station and even then it was quick. As long as I keep some good water in the tank (2-5 gal) and I can get over my OCD about poo residue, I should be good. I drive myself crazy with the time and water I use to get my tank crystal clean. Sounds like in the end it's no big deal. It's not like it's going to eat a hole in the tank. Thanks again for all the great replies! Mike