Graham the gliders seem to have a bit of a problem with circuits - the go arounds are a bit difficult!!! ;)
The gliders operate independently of the fixed wing. They have their own grass strips and they operate to the south of the field, while the runway direction of the power runways keeps you clear of the gliders.
Have a good read of the Sydney Basin guide for Camden before you fly in. It has really good information which is easy to understand. Read the ERSA too but the Sydney Basin guide gives practical advice.
If the tower is active, get the ATIS then fly in from one of the reporting points. I'd suggest Bringelly, Mayfield, or The Oaks. The southern ones of Menangle and Picton mean you have to fly through the gliding area, so you are often asked to track via the Oaks or Narellan anyway.
If you are at Mayfield, you'll probably be asked to join on base and report at 2 miles. Stay at 1,800 feet until you are told you given a sequencing instruction (eg "Number 2, follow the Cessna on final") then you can descend. From Bringelly, you'll either join downwind for 06 or join upwind or final for 24. You'll probably be asked to fly to Oran Park and report there. From the Oaks, you'll join upwind or final for 06, or downwind for 24.
If the tower is not active, you must do 3 legs of the circuit and straight-ins are not permitted, so the best way to join is at circuit height (1300) on mid downwind. There is no dead side at Camden due to the gliders and cross strip. There's often traffic so you can get circuit direction and there is an AWIS when the tower is not operating.