I don't understand the Cairns reference above, which seems to cloud the issue. The philosophy of circling is that you descend on the best possible aid to circling limit, then keeping the airfield in sight, reposition yourself, keeping the airfield in sight (vis may be down to just a few miles)- try and get yourself on a downwind or base leg and keep in sight and get it on the ground. Any loss of visual contact requires a GA, turn towards the airfield and GA. So how can Cairns have mountains in the way of that? Are you indeed, on a circling approach, allowing terrain between you and the airfield? Any peculiarities with terrain are always reflected in special instructions on the landing plates specifically for circling approaches.
It seems to me you always turn towards the airfield and then pick up the original GA. You might be doing some peculiar turns, but it will be overhead the airfield within a guaranteed (safe) column of air.