The southeastern coastal plain of the United States has millions of acres of low-relief mosaics of pine uplands and embedded wetlands. These wetlandscapes influence regional water supply and water quality and are subject to intensive management and restoration efforts. One key management decision for these forested landscapes is the density of trees, which controls the quantity of evaporation and thus water yield (i.e., rainfall minus evaporation). Models at the forest level predict changes in water yield as a function of tree biomass management, but these predictions are not well linked to responses at larger scales where the effects of water yield are needed. In this work we use a dense network of wetland wells and stream flow measurements to link what happens in the forest with water movement through a wetlandscape. We show unambiguous impacts of forest management on wetland water levels, including on depth and connectivity patterns, as well as on stream flow. Notably, forest-level models make robust predictions about variation in stream flow responses, but always overpredict flow, suggesting wetlands reduce water yield, but enhance distributed water storage. We discuss the implications of how water moves through these wetlandscapes on stream flow management and wetland organic matter storage.