4 year olds first deer hunt

Im planning on taking my 4 year old son on his first deer hunt this weekend and wanted to get some tips from anyone whos gone through a few hunts with a young child. I already know the hunt will more than likely be a short one. One of my concerns is shooting with him in the stand (I dam near blew out his mommas ear drum a fw years back shooting with her in the stand) I dont plan on shooting unless I see a nice buck and I'm going to have ear muffs for him. I jus dont want to have his ears ringing for the next couple of weeks if brutus walks out.