I recently got some proper professional portraiture film (Fuji NPS 160) that has to be kept in the fridge. This is very unfamiliar territory for me, whats the deal with the fridge? If I load the film can I leave it in the camera for a few days between shots or is it best to take all the shots on one day? Also once the film is used do I have to stash it back in the fridge before I get chance to take it to be developed? Some tips or pointers would be useful... Thanks.