I agree with everyone else. All of my girlfriend's took their FI's shopping for the wedding dress and all had at home traditional weddings. None of the men remembered the dresses come wedding day so it was just like seeing it for the first time. In fact one of the grooms was positive it was a different dress, it really wasn't his wife, my friend just was done up on wedding day whereas the day she tried on dresses she was just regular. I am the only one having a non-traditional wedding (DW) but not letting FI see till day of.....I want this part to remain traditional and so did he. Do what works best for you and your FI.