i just received some bitternut hickory for my smokers, i have not used this type of wood yet and have a few questions in regards to the wood. i know that it is a good wood to use but some of the logs i have look to have some moldy looking stuff on the outside of it along with moss. is this OK to use? do i need to get rid of the bark? anyone that can assist me with these questions would be great!!! thanks!!!!!