WILCO MARSH BUGGIES For over forty-six years, Wilco has been perfecting the craft of soft terrain-amphibious vehicles. Wilco builds soft terrain vehicles from the ground up, with a keen eye for design and with a high standard of craftsmanship that is unparalleled in the industry. Wilco has the largest inventory of amphibious excavators in the world from marsh buggies and cargo carriers to long-arm amphibious excavators. We will custom design equipment to fit your specific needs.