Snakecharmer. Under NAS 2 b there was a clear recommendation to monitor the CTAF if flying in the approach and departure airspace of an airport. In that case the Pitts would have heard your CTAF calls.
Recently I was at 9500' about 25 miles from Mildura. I monitored the Mildura CTAF and heard a departing aircraft. I was also monitoring he area frequency but for some reason did not hear a call on that frequency.