I wouldn't. Dry hopping (to me) increases the perception of hops, which would drag you even further from the style. Also, I'm not sure how well it would mesh with the clove & banana profile of your hefeweizen yeast.
Brody's Brew House
Primary: Empty :(
Seconary: Don't use one, generally
Kegged: Pumpkin Saison, Amber Ale, Scottish Strong Ale
"For a quart of ale is a dish for a king." - Shakespeare