Personally, I wouldn’t cook on a wooden deck without at least some protection unless I was there to monitor ~ Overnighters ~ Never. I know of several people that do; one of them has 3 little girls in his house and refuses to place even a 7 dollar oil drip pan under it even after many of his friends basically begged him to. I just wouldn’t take that kind of chance. An example of what can happen; someone in Virginia, I believe, was cooking on his BGE in his driveway last year and somehow, a hot coal ended up in his open garage burning most of his home to the ground. No one was hurt. Granted, that was a fluke but it can happen. Many here probably know whom I’m referring to.
I use the oil drip pan under mine. If there’s more than 10 or 15 MPH winds, no overnighter for me. Some may think that’s overcautious; I’d rather be safe than sorry with my family’s safety on the line.
Bill