Couple of cold weather ques.....

1. Is it ok to store my shoebox in the garage considering my garage can drop to 45-50 deg. in the winter plus same ques for my filled carbon tank??
2. As it starts to get colder will the temp of air in a carbon tanked gun be the same as the identical gun with steel tank ??? this might be a dumb ques but im curious and is it really that much difference.
3. Guns with stocks covering the air tube or some of the air tube ......will the gun temp be higher than ones totally exposed during the winter ? Im just curious if the wood forms some sort of insulation...something tellls me it makes no difference .