As long as it's not punky, it'll be good. Hickory usually gets borers pretty quickly, but that won't hurt it at all for smoking wood. I dug up some pieces of apple a while back that were about 15 years cut but kept dry, and they worked great.
...Half a yard full of crap to cook on like everybody else...
Just a hungry hillbilly lookin for a dead critter to cook
in one throwdown,