They allow "archery bows" but not crossbows. Virginia passed xbow use last year and it is a legal weapon in all seasons as well as all special archery seasons. No excuse for this but ignorance and, well we all know the reason.
http://www.fws.gov/backbay/Hunt%20Regulations.htm
Scroll down the page for the details.
Possession of loaded firearms or nocked arrows in or on a vehicle/boat or shooting from a vehicle/boat is prohibited. All weapons must be unloaded with actions open: while in transport, while on roads, when waiting for pick-up, and within the boundaries of the safety zones. Possession of weapons other than shot gun and archery bows are prohibited (crossbows are prohibited).