Matt, I have a 17 foot TDB and I have cooked in it alot, my gas tank is vented to the outside motor well, but I still do the cooking up front with the top open . I have been thinking of designing a charcol grill stand that would hook to the grass rail and sit about a foot above it and out over the water so I could cook stuff and still hunt at the same time, then if there was a problem I could just dump the grill in the water, and not have a bunch of hot burning things inside the boat.
There is nothing better than a hot meal on a cold day at the lake.
If I get something put together before the season gets going I'll post up some pictures.
best wishes and have a great season.
Fred