With shunks being know rabies carriers, head shooting a skunk is a not the best idea as the rabies virus is concentrated in the spine and brain. Spreading brain matter around your yard is just a good way to spread rabies in your area.
A live trap is your best bet. After they are in the trap, slowly approach the trap talking to the skunk in quiet soft tones and spread a tarp or blanket over the trap. Back your car to the trap and run a vaccun cleaner hose under the blanket to the exaust pipe and let it run for a half hour.
Do not dispose of the animal by just throwing it out in the woods, bury it deep or check with a conservation officer to see if anyone is doing rabies monitorring in the area and would take the carcass.
AWS