If you're really concerned about it being ok, I would just pop in to a drycleaner and ask them. I made the mistake of asking the staff at the bridal salon how the fabric would do in water, and they all looked at me horrified that I would even consider doing that. It was pretty funny. Keep in mind though, if you're trying to keep costs down, that drycleaning can be upwards of $300-400 for a wedding dress, depending on the dress. If you plan to sell your dress after the wedding, that's a huge cost you'll have to incur.