ridding skunk odors
Sorry to hear your crawlspace got "skunked"!
Living with Nuisance Wildlife from Oregon State University Extension has a recipe on page 2 for skunk odor cleaner made of common household products that you may already have around. It also offers guidance for how to deal with skunks around your home and land.
If the odor persists, there is discussion of more intense measures you can take in Removing Skunk Odor from University of Nebraska Extension.