As someone else who lived like this for a few months (except out of the back of a much smaller Land Rover Series III), pissing is done in hedges (and the odd beer can), shitting in public toilets or food restaurants and cooking on a gas bottle outside.
Sounds like your set up was more rural. I was doing it in the middle of a city mostly, so really had to have everything self contained. Definitely would consider having the rear doors open and ability to pull out a cooking area and pop up an awning for those times when you are sitting on a beach and need coffee and a bacon roll.
Must admit it's a pretty good way of living but not sure I would do it for years on end.
Now canal boats....now that I could see myself doing one day.
I was doing it in Leyton/Woodford in East London so borderline city/suburbs.
I'd do it again, 100% of the time but the three children, wife, mortgage and inevitable responsibilities that come with these things make it difficult if not impossible to achieve.
Narrow boats and widebeams are horrid. I lived in a narrow boat for a month. They rock very slightly, smell awful, are damp as anything (even the nice ones), cost a fortune to keep afloat and the neighbours aren't particularly nice people I've found. Very clicky, suffer from a major superiority complex and are terribly bureaucratic. Thames barge perhaps but narrow boats; never again!
Dammit you ruined the canal boat dream! Must admit, renting one for a month or two would probably be worth considering before buying one. I hear it's all about finding a mooring space.
Mine looked like this: http://www.carandclassic.co.uk/uploads/cars/land_rover/30328...
Going for swim acts as an opportunity for showering.
It's great fun after you get over the initial shock of creature comforts requiring planning and thought.
I eventualy gave in I found that the chassis had a huge hole in it and I had to start putting in as much oil as fuel.