What to do with my wedding dress?

My wedding was last month. Fortunately, my dress didn't suffer any grass stains or any major stains. (We took outdoor pictures on a beautiful park.) Now, what do I do with the dress? My Cinderella-esque dress is sooo large it will not fit in my tiny walk-in closet. I am debating taking it to a dry cleaner or dress preservationist as they will charge an obscene amount of money to just put in a bag and collect dust. My options included getting one of those space bags and just vacuuming the air out of it. (That is what you do, right?) I need to do more research on this and get on the ball. Right now, my beautiful dress is hanging on my coat rack collecting dust and absorbing the sunshine....it has kept its shape well. SO well, that it's sort of eerie looking at it at night. Almost like a ghost-bride. Eww.