I have been told you smoke fish with wood that has berries and meat that has nuts. As for wood fro smoking, I cut it up in chunks when I smoke catfish and white bass. If you cut it upo with a chainsaw, I always empied the bar oil and put in some old cooking oil that is not toxic. I wouldn't want any bar oil getting smoked into my food. As for good firewood for smoking, I thought of that too. I can get a lot of wood but I dont think ash is the best for smoking. Soft maple is a sour wood. If it smells good , it is , if it is sour, like popple, box elder it is not good for anything but a wood stove.. Nice gig ya got, and remember , wood is a commodity . It is now worth 100% more than it was 1 yr. ago . I told my wife today, that pile of wood I split this winter was wrth about $1000 in BTU's , next fall it will be worth $2,000 in BTU's. A few yrs. ago , it was hardly worth the time . I amke $45 hr. as a self employed carpenter and most times it is not worth it. I was pleased to see she is starting to have some respect for my efforts, cause this oil, gas price might get worse.