Well, I haven't seen nor smelled any skunks since I've posted, which isn't all that unusual since they've only been spotted the one time.
I cannot trap them (illegal in my area) and I called another trapping company and they, too, euthanize the animals. So I decided to get they coyote urine and sprinkle it around late in fall when they are thinking about hibernating.
In the mean time I've been sprinkling the used kitty litter on the ground around the perimeter of my deck and along the fence line where I have ground-hugging plants (Hostas, etc.) . . . I haven't noticed an odor.
Funny -- DD#1 came for a visit yesterday and she went to clean the cat box. I asked her to go sprinkle it around the deck. She looked shocked and said "Isn't that kinda gross?" I explained to her about the skunks and it was suppose to be a deterrent. She went outside still shaking her head thinking I was really weird.
I went out a little while later and saw that she did, indeed, sprinkle the litter all around . . . on the deck floor.
I should have been a bit more clear on what I meant by AROUND the deck.