It's best to let it season. Green wood and bark can produce off flavors sometimes. However I have heard of some people using fresh wood. Personally I dont. I let it season.
1 - 100 lb. self-made cylinder grill/smoker
1 - 100 lb. self-made cylinder smoker
1 - 20 gal. self-made grill/smoker
1 - 25 gal. self-made vertical smoker
1 - 120 gal. self-made trailer stick-burner