Centerpiece Ideas With Out Flowers

I am getting married September 6th, at my aunt`s house on a small lake. I am looking for decorating ideas for the ceremony. The reception is at a non-formal style hall, and I am looking for decorating and centerpiece ideas (without flowers) I was thinking of using tree branches from my own yard decorated with crystals etc. But I am having a hard time picturing what the final result will look like. Any one know where i can find pictures of this, or any ideas. Thanks!