Portable toilets...for camping

A shovel and a roll works for me and the Mrs, 95% of the time.

Otherwise we use "Jummy's thunderbox", A flip out portable shower tent/dunny screen. Ours is a single job, but some people prefer a double unit.
We dig a deep hole with a 240 post hole shovel. Never use water, but we sprinkle lime over deposits, as this stops the smell.
We also have a Porta Potty, which as far as we are concerned is a total waste of time, but some people like them.
Cheers Bucky

tethford is the best brand to buy, they come in various sizes, just choose the one that suits you.

When I checked out the prices on the double size, the site Deals Direct seems to be cheapest.

Another vote for Jimmy's Thunderbox.

Compact, easy to use and you don't feel like your going to fall off it.

Shower tent as well if privacy is required.

Cheers

Wife and I used to be hole diggers but have moved over to porta loos after travelling through the WA north where hard, rocky ground made digging deep holes difficult.

We subsequently bought a coleman port a loo and sure beats digging deep holes in rocky ground.

A little toilet brush to clean the bowl, some chemical and a shower tent if we camp in popular spots and life is relatively simple.

If you are going down this line make sure your loo is has a suitable space (no point buying a high loo if you are stashing it under a bed somewhere) but has a height that suits your family.

Andrew,

The Thetford 165 Porta Potti is a very good device, having good height and a 20 litre waste tank. I also have a 145 model but these are just too small for use by multiple people. They only have an 11 litre waste tank and are lower to the ground.
Good for portability but not so for practical use by two or more people.

However, with three girlies using it, you will find you may need to empty it almost daily. Wee and paper and flushing water will tend to fill the tank fairly quickly, then there is the solid waste which everyone needs to "expire".
Try encouraging the girls to wee into a bucket and place the paper in another container. Then you can simply tip out the urine onto the dirt without any impact to Mother Nature. The paper can be burnt at a convenient time.
We actually use a bucket with a lid inside our camper at night to cater for the "wee hours excursion". We add a drop of two of eucalyptus disinfectant which stops any unpleasant odour, then tip the liquid out in the morning.

The Jimmy's Thunderbox is another option and you can use plastic liners to contain the waste, but, you still need to dispose of it in an environmentally effective way.

We use the Porta Potti and Home brand Napisan, available from Woolworths supermarkets. Much better than the Thetford chemicals, much cheaper too and much kinder to the environment.

Main criticism of the Jimmy's thunderbox is that its not very big and can easily disappear down the hole in a sandy environment like the desert.

When we're in a group, we dig a hole and use a plywood box - bigger than the thunderbox (so it doesn't slip down the hole) and with a real seat. We use large paper bags as a liner which we burn off before the ceremonial burial. Others simply use a newspaper liner.

When its just the 2 of us a Thetford 165 does us nicely and fits perfectly inside the Tvan.

When we do bushies, we take matches and burn the paper. We travel in winter when there's no fire risk.

Cheers
Phil

Porta loos can come in different heights. Choose one that has a good height, lower ones can have the potential for your knees to be around your ears, when seated, if you get my meaning! Regards G.T.