I have read numerous posts on this site regarding brining and injecting etc, but I didn't come across any about making gravy with drippings. Is it possible to do this? Weber website says to place a foil tray under the bird and collect the drippings, then make gravy as usual. Another post said to be sure to add 1/2 g of water in the tray or the drippings dry out and are unusable. I plan on brining my Butterball, add adding flavored butter under the skin....will this release enough fluid to make gravy? I have roasted a turkey more than 15 times, but this is my 1st time using my smokey. Any posts would be greatly appreciated.