On a recent trip on Michigan's Au Sable River, we went over several dams. The portages weren't difficult, and made easier by using wheeled carts that strap onto kayaks and canoes. This eliminates having to unload and reload each boat at each portage. Two of us had a Paddleboy Mighty Mite Boat Cart from Campmor. It's a nice looking little cart, but the ball bearings are woefully inadequate. Both carts started to fail. To Campmor's credit, they are sending a prepaid tag, and both of us will ship them back. If anyone is contemplating a new cart, avoid this one. I've since ordered a heavier duty Paddleboy cart with bronze bushings. Frankly, I'd as soon have a block of oiled maple for these slow speed bearing surfaces. We'll see how this one pans out.