We've had both types and due to our age and the height of the TCs prefer the normal holding tank as a house is easier to lift than a full or even partially full cassette. Also have the issue of cassette seal not being tight enough to contain sewage in a sanitary manner. If you gave a cassette where is your grey water going a well? It is going to need dumped as well. All personal preference and physical condition I guess. If you're really concerned use the Wag Bags when boondocking and all that's required is a dumpster or trash can rather than a dump station or bathroom.