Report 71799: Local couple hear loud knocks from different directions in Coeur d' Alene Mountains, 5 miles north of Osburn

Knowing that today was going to be one of the last sunny days, my husband and I went for a drive in the nearby mountains. I spend a lot of time in this specific location when I go four wheeler riding. From here I can hear anyone driving around this section of mountains. We got to the top of the mountain around 1:30 PM and decided to play a game of cribbage on the tailgate of our truck. We were there for about an hour listening to the quiet and birds and other little critters, when we heard what sounded like someone hitting a home run with a wooden base ball bat. The sound came from the southeast of us, maybe about 100 yards away. We both look at each other and we agreed that was a tree knock. We continued playing our game. I noticed that after this the birds stopped chirping for a while. It was very quiet, very quiet. Then at  3:14 PM we heard another knock. This one appeared to be about 50-75 yards north of the first knock.  At this time I told my husband let's hurry up and finish our game and walk over the direction the knocking came from. We finished the game then walked about 20 yards at this time I decided to do a howl and then I did one tree knock. Within 5 seconds we heard a knock back. This one came from the same direction of the second knock but sounded farther away. At that time we decided we should go back towards the truck. As we started walking back, we heard a fourth knock this one came from the west on the other side of our truck. We walked back, past the truck and walked about  20-30 yards but heard nothing more.