Ok, trying to get back on track..... I am asking about noise and scaring away game.
I am actually talking about small game hunting, and ONLY small game hunting around the camp. So, no one is planning on carrying multiple firearms. Example - while Buddy A is boiling water for coffee or making supper/lunch, Buddy B takes his 22LR or 410 and starts walking around looking for grouse. I suspect we will be big-game hunting within a couple km of camp but it's possible that it will be further away.
One guy is saying he comes back to camp for lunch. He plans on walking around with his 410 during his "lunch hour" (not carrying his centerfire rifle).
No one is planning or is anticipated to break any rules or regulations.
Since Ontario allows deer/moose/bear to be taken with a slug from any shotgun (including 410) (see Summary of firearms restrictions for hunting in Ontario for verification) I suspect that the guy bringing his 410 will have some slugs with him.
I personally am not a fan, and all of the deer/bear hunting I have done with my dad & friends I've always said no shooting/hunting small game. I know it is legal to shoot a grouse with a 303 British or 7mm Mag, but I have no intention of doing so. I am debating on bringing up a 22LR or a shotgun to hunt at times I'm in camp.
This website
https://earinc.com/gunfire-noise-level-reference-chart/ indicates that a 410 is comparable to a 20g and a 12g for noise.