They finally made it clear, the 2009-2010 proclamationis out and it states that smokeless is not allowed in muzzleloader season. Page 6 Of course you can use it in the "Any Legal Sporting Arm" season.
It's even listed in bold.
Muzzleloader
Includes rifles and shotguns in which the charge and projectile are
loaded through the muzzle. Only black powder, Pyrodex, or an
equivalent substitute may be used. Smokeless powder is illegal.
Legal muzzleloading shotguns are those capable of being fired
from the shoulder only. Muzzleloaders may use in-line ignition,
pelleted powder, sabots, belted bullets, and scopes.
It's even listed in bold.