Crystal Clear Water
We don't know what Bethesda's version of West Virginia will look like exactly, but we fully expect there to be bodies of water to explore.
The developer typically hides loot and materials at the bottoms of rivers and lakes. If Fallout 76's map features lakes and streams, you'll likely want to explore their murky depths with your companions. This is where a mod like Crystal Clear Water would come in handy.
Crystal Clear Water makes all of Fallout's bodies of water extremely clear. In turn, this enables you to see items that are buried in their depths.
The mod takes a little bit of the fun out of underwater exploration, but it would come in handy if you're short on time.
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