Mernice, I think posters often relate their own experiences to help give the OP some perspective on the issue. Also, sometimes, our own experience is all we have to go on.
Hilda, I agree that "Say Yes to the Dress" may be creating ridiculous expectations. I certainly don't get those brides who bring in a whole range of people. There are bound to be different opinions and arguments about the "best dress." But I imagine some brides and their families are like that. And, as far as I know, the idea of the bride and her mum going wedding dress shopping together is a time-honroed tradition, anyhow. I just think times have changed, and no one should base their expectations on a TV show or even a tradition.
The only expectation to have, IMO, is that of a good time at DD's wedding. Or if you (general MOB) won't/can't be there, then just that she'll have a fine time and a happy marriage.