Possible Clues:

• Shoulder bag
• Backpack
• Pack horse used around states
• Affirms horse on the outside had the bag
• Bag
• Carrier claims journalist is outside
• Have to dismiss about the capital of Russia on back there
• 'The burden is behind me', he writes about drunken raves
• Agrees the horse should carry the backpack
• Bag needed by journalist covering raves, perhaps?