Sorry, the first excerpt was to point out that -
The first arrivals were over two thousand ..... They arrived at Hay on 7 September 1940 by four trains from Sydney. ...... On 1 March 1946 the Japanese POWs departed from Hay in five trains, transferred to Tatura.
This would suggest there were more than 2000 Japanese at Hay (I guess they could have used smaller trains.)
I meant to edit the quote but mucked it up.
Dad used to tell us his scariest times during the war were when he had to go inside the compound at the camp. They went in pairs, but were only allowed to carry kettle sticks (again the shortened broom handles used to stir and extricate the clothes from the big copper wash kettles). The guns were only used by perimeter guards as deterrents from anyone trying to escape the compound.