I can't find the SG 11 model on Google, but I can find the SQ11. Assuming they are the same thing, this is not something Barry would ever use as a game camera, as he claimed.
After Barry's shotgun escapade during Andy's search in which he was installing game cameras, I got the idea to buy one myself, here's a coyote it captured (Thanks Barry).
View attachment 334379
They are weather resistant, and way more effective than some tiny 30 dollar device.
That (sq11 or whatever) is absolutely a spy camera, and he would have purchased it as such. He had no shortage of game cameras, and he would never use something like that tiny little thing for that purpose.
He also claimed to not recall when he purchased it, as Grusing was trying to date it around the time of Suzanne's disappearance.
As we know by now, "I don't recall" is a lie. I have little doubt that camera was in use prior to Suzanne's disappearance, and I would bet money that it captured things that enraged him that week.
If not the very day in question.