I know this is going to sound absolutely horrible, but when we lose a dog here in Arkansas, and want to bury them out back or somewhere, we will also use the citrus stuff. It helps keep dogs, cats, skunks, other critters away. We usually put alot towards the top, etc.
Another thing that may help, is Mothballs. If your like me, then you will ignore that suggestion, as I couldnt STAND to be smoking around that nonsense, but it works. We usually pop some in the ground with our thumb, so they stay a little bit longer. Then we may cast a few out as well. It really doesnt take alot. I would say if you have a bush area like 10 feet long, and maybe 5 feet wide, that throwing 5 or so back there would probably do the job?
Otherwise, the only thing you can do is kill it.... unfortunately skunks are hard to get pointing the other way, with out them spraying everything around. We had a rabid one around our area (I didnt know it was rabid at the time) so I just wanted him to go the other direction. Took out my 22 and shot around him. He came running at me (after he sprayed the area first) I had to put him down.....
I also shot one (not killing it) one time, and it sprayed FOREVER! till it died. So... For everyone else... Make SURE you put it down quick! My yard stunk up my house soo bad we had to stay a night at the in-laws....
my 2 cents,
-Chrisso