Can I Get a Wheatness?

I am amazed to discover how difficult it is to get wheat to put in a flower arrangement! Our florist for the wedding has told me that it will cost over a HUNDRED dollars to add wheat into the mix... meanwhile I have been thinking it would be the most natural, inexpensive filler fo fill out our various wedding bouquets! Of course, now that I know how difficult it is to get, I'm seeing it just about everywhere, springing up in garden arrangements and as a weed outside our local pizza dive. Is it trashy to pick flowers and fill your own arrangement?