Ok, sorry to lower the tone, but have a few very basic questions. We pick our first MH up in a couple of weeks, which has a Therford cassette/ toilet in it. We have never camped before or ever used this type of facility. So, here goes with a few questions which we would be very grateful for some guidance:- 1. Is it a case of keep taking it out to see if it's full? Or generally are there a rough number of flushes that can be made before it's nearing capacity. 2.what do you put in the cassette in terms of chemical/tablets etc, and what do people recommend? 3. As we intend to do some wild camping, is it advisable to carry a spare cassette, that we can swap over if the first one gets full, and then carry the full one in the garage until we reach the next disposal point? 4. Is it correct that you don't empty down an ordinary toilet? But what about emptying down our own toilet once we get home? 5 any other advise/tips gratefully accepted. Many thanks.