Done this on my big charcoal grill before via indirect heat and pear wood. I spent a few hours googling about and just threw together a standard cornbread recipe <Sadly I had to use jiffy mix. I thought I had buttermilk. I had a cup and needed 2.5 for my recipe>
I had mine for a half hour, and then did a tooth pick test. Just make sure that skillet is well oiled so it doesn't stick. Myron Mixon's cook book has a recipe and the smoke time is 45 minutes at average meat cooking temps <250 to 300f> in his book.
Funny thing; when I have done this I couldn't taste the smoke flavour the day of. The indirect heat and smokey chicken was much more distinct. Next day with out it? It showed up, just an oddity I noticed. Or I was sucking in so much smoke over the afternoon from grilling for hours for Mother's Day I couldn't taste any more!