Fallen apple wood in the orchard

The apple trees in the orchard next door have been laying around for years on the ground.They are reddish brown inside when cut.I suppose they wont smell appley until they are burnt.After the bark is peeled off could you use it on my new smoker???
As you can tell.Im new to smoking.All advise is welcome.

I use a lot of apple wood (a friend of mine owns an apple orchard and winery)...good stuff...especially on pork! Be careful that the wood isn't rotten, otherwise the smoke will be bitter. I try to age the wood a year before using it, but often end up smoking it before it gets to that age. The Rhino Rule of Thumb: Rotten Wood = Rotten Smoke. When in doubt, throw it out. Just my two cents.