Your first challenge would be unloading/rewinding the 120 roll, for the many cameras that do not have such a feature, then reloading within acceptable margins. It's not a 30 second doddle like 35mm... Just leave it in the camera.
On 12th March I removed a roll of 120 Velvia 100F from my 6x9 multiformat pinhole camera. The film was loaded on 10th June, 2011 and has been through very cold, very hot, very wet, very humid environments — repeatedly. All sensible precautions were taken in humid places. I am not concerned about any ill-effects (if any, like casts) that can be repatriated in a hybrid workflow. Film can tolerate a great many extremes of temperature, but it is humidity that causes the real and visible damage and which requires care in transit and storage.
Last edited by Poisson Du Jour; 03-12-2012 at 07:15 PM. Click to view previous post history.