The campground my parents camp at hosts a Halloween weekend every year. The boys decided they definitely had to dress up like The Robertsons from Duck Dynasty. They even talked their dad and grandpa into dressing up so four Robertson men were represented.
We used the two beards we had already created for David's birthday party (http://workingmomwonders.blogspot.com/2013/07/duck-dynasty-birthday-party_12.html). We bought two more pieces of crafting fur from Hobby Lobby and cut out two more beards.
Using a gray sharpie, I colored in some areas of the white beards so they looked more like Si and Phil.
Add bandanas or hats, Duck Dynasty t-shirts, and some sunglasses and the costume is complete.
For finishing touches, David added his Duck Commander lanyard and duck call and gave Grandpa (Si) his Si tea cup.