Complex sentence: Later in life Kephart campaigned for the establishment of a national park in the Great Smoky Mountains with photographer and friend George Masa, and lived long enough to know that the park would be created; he helped plot the route of the Appalachian Trail through the Smokies.
Split into simpler sentences: Later in life Kephart campaigned for the establishment of a national park in the Great Smoky Mountains with photographer and friend George Masa, and lived long enough to know that the park would be created. He also helped plot the route of the Appalachian Trail through the Smokies.