Mine stays strapped down in the van so no-one sees it anyway.
As mentioned the internal feed hose means you can run off a larger tank from elsewhere in the van. if you use this method the downside are the float cutoffs for the motors, basically they don't really work so you do need to be on the ball for keeping an eye out for how the waste tank is filling up.
Also there's no heater but that's easily rectified with a 3kw emersion heater drilled through the side.