Pete,
I'll second the Sika hunts around the Chesapeake, and there is public access in the Blackwater National Wildlife Refuge and Assateague Island National Seashore. I can't speak for Blackwater but I can assure you there are totally impenetrable parts of Assateague island. It is a very cool environment though because it is also very diverse, besides the nasty thorn thickets, there are sandy pine flats, scrub sand dune hills, salty marshes and a kind of marshy savannah in places too. It's a great adventure and an exceptionally challenging hunt too. Their rut is a little earlier than the whitetails and starts in October, it overlaps the tail-end of archery and the beginning of muzzleloader in Assateague. -Kyle