Good morning to you too!
Ah, Australia, that explains the good morning in the middle of the night… 
I hate such cases as well.
Do you have any sample images?
And maybe a screenshot of the tie point cloud with cameras activated?
Have you tried decimation master in ZBrush?
Also, Meshlab offers a huge array of possibilities, as well as cloudcompare.
In the end, it is not so much different from filtering laser scans from scanners, most of them also have a certain noise.
Anyone experience with that?