Related Clues:

• Hayride vehicles
• Prairie schooners
• 46-Across vehicles
• Strong carts for heavy goods
• Conestogas
• Camions
• Carts
• Some were covered
• They're sometimes circled
• Pioneer carriers
• Chuck and station
• See 25 Across
• Sturdy carts
• Pioneers' vehicles
• They may be covered and circled