Agree with all the above, have your paperwork filled out and ready ahead of time, leave your handguns at home, leave your rifles in the car unless they tell you otherwise, and most importantly bring a pleasant, friendly attitude.
The last time my buddy and I crossed over for fall bear (2018), we were done and back to the car in about 10 minutes. However, a truck with 3 other hunters pulled up about the same time we did, and immediately started with attitude with the Canadian border patrol officers. Their pickup was packed to the gills, officers began asking questions and asked them to partially unload a few things out of the back. I didn't hear it all, but heard one guy make a remark about "the gestapo", at which time my buddy and I quickly walked away and into the office. When we came back out, EVERYTHING had been unloaded from the truck and they were getting lots of attention, removing inside door panels and truck seats. Again, have no idea what all occurred, but I can assure you they were going to be there for quite a while. We got back in our car, smiled, and drove on our way.