we owned a storage business and I would only use it if storing for a very short time. Also using charcoal (I use the cheap bbq stuff) in an open sided container or a mess bag really absorbs odors, so everything should smell ok when you take it out of storage. (We used it in the care facitly when someone had cancer that produced odors or other issues with odor.
Someone suggested having an organized friend, who's oppinion you respect, to help you get rid of some of the clutter. I know I got tough on myself when we renovated and got rid of many things, still have some to go. My SIL and I went to my other SIL's house and helped her get rid of lots of things she was hanging onto, she said feels like she is lighter with less in her house.