Salute!
The base I thot that the Canberra squad used was Soc Trang, but no doubt they were at Phan Rang, and the U.S. Red Birds and Yellow Birds flew outta there when I had first tour in 67-68. Apparently they also flew outta DaNang as Elaine Shepard talks about in her book "Doom Pussy", see:
I saw all three units, but only the USAF ones over the Trail when I was up there a few months in early 1968.
I think the RAAF FAc's I worked with were the Sidewinders.....
Gums recalls...