Where I live the RH is usually well above 55% usually around 80% during the summer. I have never had any problem with refrigerating film. I often buy in bulk and freeze the film. When I need a roll I put the canister in my pocket for about an hour. Again no problems. I have placed bulk loaders in zip-lock bags and refrigerated them. I wait 24 hours before opening the bags.
Rice is easily regenerated in a microwave. Be careful it will get very hot so you might try doing this in steps. Wait for the rice to cool before heating it some more.
Be careful with silica gel as the dust it produces is very hard and if any gets into the film cassette it could scratch the film.