Since the smell is probably concentrated in the dog's fur, why not shave him bald and then give him a nice bath? Kendall would be surprised to have a Maine Hairless when he returns, and Seamus could wear nice jackets until his hair grows out again. You could even trap the skunk and make it into a cute little hat for Seamus to wear for a while, sort of a Davy Crockett kind of thing (it will help immensely it the skunk is dead when you do this).

Why, I'll betcha that just the look on Kendall's face when he saw his bald dog with a skunk cap would be worth all the trouble!

(I've always thought skunk smelled like perculating coffee.)