Where can I find good duck hunting near Moscow?

Unfortunately, the Clearwater Region is not well known for its waterfowl hunting.  Access is limited due to private property but some field hunting and jump shooting of regional streams/ponds is available during migration with landowner permission.  Scouting is the key for success for both birds and landowners willing to allow access.  I'd suggest you watch birds from the U of I dairy ponds (behind WinCo) to see where they are feeding and try to gain permission from those landowners who have birds present.  Good Luck!