Skunks do not generally spray in an enclosed space. An enclosed trap containing a skunk can be gently picked up and moved with a vehicle to another location for skunk release or destruction, generally without incident. Skunks that are being released should be moved at least 12 km to prevent their return. Destroy captured skunks humanely. You may release them at a safe location and shoot them with a shotgun, or wrap the trap tightly in plastic and then gas with propane for about five minutes to asphyxiate the skunk.
Skunks are easy to catch in live traps.
Use sardines or moist cat food as bait. Place the bait inside, at the back of the trap. When the skunk tries to get the bait, the trap door closes and captures the skunk. Make sure you have caught a skunk and not a cat or other small animal before moving the animal or gassing it. Live traps should have an inspection hole in the top for identifying what you have caught.