Here's a few more videos for you, Bridget and Whipper. You may recognize the 6x6World members from the videos.
Attex 450 Tomahawk Creek Crossing Amphibious 6x6 ATV 6 wheeler - YouTube
Max IV 6 wheeler Snow Hill Climbing Amphibious ATV 6x6 - YouTube
Attex and Max Amphibious 6x6 ATVs crossing a creek - YouTube