FlyingForFun,
I have no doubt that TCAS has improved things, however when I worked in that part of the world , that particular piece of equipment was in its infancy.
As for special procedures, there are none apart from the recommendations in the AIP about calling units when you are operating in the vicinity. However, you can not force anyone to do this otherwise it becomes CAS by proxy. All you can do is provide an air traffic control service to participating flights (separate know IFR flights, traffic info on VFR etc) and hope that the big sky, small aeroplane theory holds out against any other traffic that may be out there and not talking to you.