I have a shot (filmed) and am planning on using maya for creating a sort of whispy fog bank and then composiiting it together.

The thing is, i need the fog to react to one of the actors
(have tendrils of fog wrapping around the actor, and then clearing as he emerges from the fog bank)
Anyone have any ideas how to go about doing this? If doing actual tenrils is going to be too hard then it could just be the fog drawing back around him as he emerges.
Would it be a case of setting up a deflector object, matching that to the actors movement and use particles as the fog? could
i use Fluid dynamics?
any help greatfully recieved... mayas particles / dynamics is somthing I've not really touched upon before