The best answer to this question is: Why not? Grand, formal weddings are expensive and time consuming to plan and implement effectively (most people working on them for a year or more). A wedding is stress level for your special day, after several notches relaxed. More casual weddings are a fantastic way for the "second" pair, for people who spontaneously decide to marry, and for small meetings.
Informal Wedding Dress advantages:
Thinking about your wedding dress plus size, you will be happy to know that the dress should not be a contract for an event. Most wedding dresses are made occasional full-featured, allowing them to other similar events can be accommodated without screaming "wedding dress". There really are many options to choose from, including non-traditional colors and shorter lengths.
Other informal wedding dresses are "ready to wear" - which means that you do not wait 10 weeks for one bridal shop to place your order at the store to get.