Smoke from nearby campfires is more likely to linger than cooking smells. Why have a galley in the TT if you're not going to use it? We use our outdoor kitchen along with grill as much as possible, but stove and microwave get used as needed. As already stated, ventilate as needed.
I so agree with the statement that it's your camper....use it the way you wish! I've never understood folks that don't use the bathroom facilities for what they're designed i.e. trying to keep the black tank clean!!
But...to each his own!