Sorry, took some time to come back to your question.


Pistes:
The pistes along the Auob and Nossob rivers are easy to do, even with a sedan car. Most other pistes are sandy, esp. the ones to and from Kaa gate in the north-east. In fact, coming from Kaa, travellingsouth-westwards there are two tracks. The northern track is a one-way piste from Kaa towards the Nossob river. One-way because you have to cross sand dunes where you cannot crawl but have to take them at speed.
A bit south of this 4x4 trail is the "normal" piste, also going from Kaa gate towards the Nossob. This can be travelled in both directions. But also rather for 4x4's because of the deep sand.


Wildlife:
Most animal sightings are to be expected along the two rivers, Auob and Nossob. Funny enough we saw lots of game on a piste ouside the reserve. There is a piste going north-east which starts about 6 kms south of Kaa, going to the Zutshwa village. Quite a romantic stretch regarding the landscape.


Camping:
I have listed the camp sites in my above post. The big camps also offer small huts an/or safari tents. Otherwise the remote camps are very basic. Pit toilets, primitive showers (that sometimes work). NO FENCES! Meaning that the animals stroll through the camp at night.
Reservation are obligatory. Usually the bush camps only have a very limited number of sites.



Climate:
Best times are April/May or Sept/Oct. November to March it's bloody hot around there....



All in all I'm not sure whether it's a good idea to go there with a toddler


I believe the South African game reserves like the Kruger Park or the Hluhluwe Game Reserve offer the better touristic infrastructure. The Kgalagadi is more like a tough challenge....


Hope this helps.

__________________
Only when we pause to wonder
do we go beyond the limits of our little lives.
(Rod McKuen)