It may seem like a minor thing, but protecting the trees and forest diversity of State Parks is a big deal. Often, new infestations of tree-killing insects and diseases are first found in campgrounds and parks because campers have accidently spread these invasive species when they brought firewood along with them.
The Virginia Department of Agriculture and Consumer Services actually issues wood quarantines for many counties, due to invasive species. Moving firewood in violation of a quarantine is a Class 1 misdemeanor, which could result in being jailed for up to a year, or a fine of $2,500, or both. Firewood is available for purchase at all State Parks, and spending a little for firewood at the park is much wiser than risking a major fine – not to mention jail time!