Chris, we stayed at Third Bridge in April 2012.
Not sure how much it has gone backwards since then, but at the time they were busy upgrading the ablutions.
The camp was clean, the wildlife reasonable and the ablutions were adequate. If you can survive at Baines, you can thrive at third bridge.
My feeling is, if you are going for the camp facilities, go to SANPARKS.
If you are going for the experience, and to be as close as possible to nature, go to third bridge.
Mag ons ons kenniskry met lekkerkry aanhoukry.