Howzit Ian... and welcome to Sealine.
A mate of mine used to own Pafuri River Camp, very close to the KNP entrance. He has sold it now, but if you are interested, I can fwd the new owners contact details.
The camp is not on the Limpopo but a short drive will get you on the banks. Sean (my mate) used to get some good tigers where he fished. But there is very very little water in the Limpopo right now. We have had a wicked drought this last summer.