Not 100% sure around the culcain area but from memory there was/is an ALA about 10NM east of the The Rock. Have you considered Holbrook? it's not that far to the east from Culcain.
As for around the Junee area there is a place called federation which is about 10NM north of wagga, on the eastern side of the Coolamon rd. Now there is also a small ag operator west nor west of junee I would assume that s/he has some form of strip to use. I'm only aware of this as I travel the road north of wagga lots. (average 7-10 times return a week, mostly at night) I have only seen actual flying in the area a few time's in the last few years, doesn't mean it's not in use though. Goes by the name of crowley airways occording to a roadsign
I have not used any of these so I cant give you any further info sorry.