Not all oaks are the same. Some red oaks are very sappy. Post oaks sometimes smell really realy bad when cut into. Someone said liveoak is a nasty smoke. Maybe because it is evergreen. There are also many sub-genus varieties of red and white oaks and are widely planted for many years now as ornamental and landscape trees. I am not sure about laurel oak trees. The small red oak tree in my backyard that I trim and use is a hybrid called Scarlet Oak. No problems with it, actually very good. I don't know about acorns, I have used a few nut shells like pecan, hickory, almond. Not bad in moderation. Whatever you use, be sure it is dried thoroughly. I have been using alot of redoak and muscadine that is well over 2 years old and creates alot of crusty buildup in the top of the smoker anyhow. Both woods had been in the summer sun all summer one year.