ebay HUW and 30 cwt pictures
 

Here's some pix I got off ebay. They're from an artillery training unit in Petawawa and elsewhere.
The pix are low res but I'm posting them anyway for reference. The HUW radio setup pix are hard to find.
I think the HUW pix are all the same one. It's captioned as the command vehicle.

The first two are 30 cwts and likely LAATs since they were using 40mm Bofors.
The next two are 15 cwts and the last is a water buffalo.