Explosives, firearms, other weapons and fireworks.
The possession of loaded firearms, ammunition, loaded projectile firing devices, bows and arrows, crossbows, explosives or explosive devices of any kind, including fireworks, is prohibited unless:
(a) In the possession of a Federal, state or local law enforcement officer;
(b) Being used for hunting or fishing as permitted under §327.8, with devices being unloaded when transported to, from or between hunting and fishing sites;
(c) Being used at authorized shooting ranges; or
(d) Written permission has been received from the District Engineer.
Source: http://www.handgunlaw.us/documents/COERulesPamphlet.pdf
I read the FAQ on TPW website
It sounds like you can carry but not openly