Think like a 7 year old. Make sure he's warm enough. Involve him as much as he can. I had an old pair of binos that I let him play with. Ask him where he thinks you should go next, etc. As BR said, stories are awesome and teach him about sign.
I always played a game with my kids that the first person to see a deer gets $ 5 and I always waited for them to be the first.
Just make it fun and don't worry too much about being successful. But if you do see something, shoot it, regardless of how big. My boy loved being involved in tagging out. He also loved playing with left over deer hooves, making tracks in the back yard months after the season was over.
Good luck Sallaberry. Have a blast.