Yes sorry that was sent via my darn phone, little keys and big fingers I am afraid. We had Captain and just the two of us. Now there was an indicator in the head for the waste tank (which on one of the Captains did not function at all - that was helpful) but the other one definitely worked. As I said we found after 3 days it was reading well ready to pump out. So try and think where you are going and pop in mid week and have a quick pump out and then you should be set for the rest of your trip.
Years ago we used to have the 'dump' type loos and although it was all a bit Heath Robinson or basic it certainly did not fill up so quickly as the electric loos.
If you are staying down South Brooms will do a pump out for you free of charge, they are open most days in the season.
All you need now is the weather. Wishing you a very happy holiday.