Looks like the backcountry isn’t user serviceable, I’m thinking that since 1. It’s going on my big game rifle so round count will be low and 2. I shot copper bullets with that gun, this really isn’t an issue?
You can do a lot of damage pretty quickly unfortunately, one good muzzle blast without ears is all it takes.
You're right. Anyone whose spent any amount of time sitting in a duck blind with other guys knows about accidental muzzle blast. I generally hunt alone. This fella will be hunting with his beginner wife, right beside her probably. Muzzle blast might be a concern for him. But both SHOULD be behind the gun which should mitigate considerably. Most PHs in South Africa have gone to suppressors on loner rifles mostly for this reason. They have to stand next to clients shooting guns every day. The exceptions are the dangerous game loner guns. No suppressors because they make those guns too unwieldy in combat situations. That's the reason they gave me anyway. So, for OP's sake, I suppose there is some merit in adding a suppressor. I hope the benefit is not outweighed by the unwieldy factor. Or perhaps he will be the gun bearer? Probably.
Then don’t buy one. Nobody cares that you don’t want one and don’t think they’re necessary. They are an excellent tool for new or inexperienced shooters. I would have loved one on my 243 as a kid and it would have prevented some bad habits.
This is what I've got for hearing aids. I love em. As for comfort, I hardly notice I'm wearing them. I can control them individually with my phone. Nice feature is blue tooth into my TV. Great to be able to listen to TV movies in stereo with the room environment turned off.
The ears are pretty darn good. 
