When I've done cooking in the cold (admittedly less than at other times) I have found very little need for adjustments. MAYBE a little more heat, but that's about it.
I'm working on a chili recipe at home, and I'm thinking that one of these Saturdays, maybe in November, I need to bust out the dutch oven and make it in there. If so, I'll have to quantify it, right now it's sort of "add a little bit of this, add a little bit of that", but I'm thinking that using the cast iron can only make it better.
-Darren