Freezers are cold. If you can't bring the changing bag to the freezer, bring the freezer to the changing bag. I found that putting a tub of ice into the changing bag helps to an extent. The ice condenses the humidity if the temperature is below the dew point, and it cools the interior of the bag. It is not a total solution, but it does help. The other is that I gave up on Paterson reels for 120. Now I use plastic reels that have large shelves where the film goes in, to make it easier to get the film started, and took out the ball bearings. Then instead of twisting the reels back and forth to work the film onto the reel, I just use my thumb and fingers to work the film in. The result is far fewer damaged rolls of film.
My favorite question is "What does this button do?"