Having a selection of cams available does add some weight. As well, cams do walk. As mentioned nuts and wedges can be more solid but also have a limited range of sizes per piece for placement. Another option with a larger range of placements are hex nuts, which offer up to 5 different sizes of cracks that they can be placed in. If you know the area that you are visiting, a pair of hexes can offer all the options needed, foregoing the need for carrying a small pile of gear.
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