Guru,
As long as they can see it, I think it will work.
I've hunted large blocks of forest all my life. It truly is an entirely different ballgame than hunting woodlot whitetails. Much, much more difficult in my opinion.
One thing I started doing probably 20 years ago was when I'm hunting major blocks of timber consider open hardwoods to be a field. By keeping that in mind and, then, being able to recognize the edges within the block of woodland I increased my success rate (both seeing and harvesting) dramatically.
I much prefer to hunt woodlot deer. They are easier to pattern, easier to approach, and more concentrated. That's not always possible for me and I often end up on huge blocks of National Forest here in Virginia.
Huge blocks of timber in our mountains can be very intimidating for people that don't have experience with it and the above advice is what I always give them.
But, back on topic, if its open hardwoods, then I say yes. Should be very similar response to fields as long as you can insure the buck can see the decoy.