US national park visitor experiences during COVID-19: Data from Acadia, Glacier, Grand Teton, Shenandoah, and Yellowstone National Parks. - Taff, B. Derrick; Thomsen, Jennifer; Rice, William L.; Miller, Zachary; Newton, Jennifer; Miller, Lauren; Gibson, Adam; Riddle, Mary; Schaberl, James P.; McCormick, Madison (Parks Stewardship Forum, 2022)