Fruit wood I wouldn't worry about it. If the oak bark is loose knock it off otherwise don't bother - the hickory...I'd try to take some of the bark off - hickeory can go WAY over the top and get bitter and the bark could exacerbate the bitterness!! :D
Just my opinion.
Southern Brethren BBQ Competition Team
"It's all about getting paid!" - Myron Mixon
"I love being hated in my hometown!" - David Hair
KingFisher Gator Rotisserie cooker, WSM, Stainless 5 burner with IR gas grill, Turkey Fryer, Weber JD Commemorative grill, slightly used Bandera chamber for future use as a cold smoker, Masterbuilt 40" insulated ELECTRIC smoker