Cranberry Punch

2- 48 ounces bottles cranberry juice
1- 48 ounce bottle Cran-Raspberry juice
1- 33.8 ounce bottle ginger ale
1- 740 ml. bottle non-alcoholic white grape juice
1-½ cups vodka
* Mix all ingredients except ginger ale. Chill. Pour into punch bowl and add ginger ale just before serving.