“…In comparison, more rigorous methodologies for visitor monitoring are common in other fields of outdoor recreation and tourism. For example, periodic surveys are used to determine acceptable crowding norms for trail walking (Arnberger & Haider, 2007) and summer hiking (Needham, Rollins, & Wood, 2004), while the efficacy of automatic counter and visual recording technologies in parks has been established for some time (Cessford & Muhar, 2003 (Orellana, Bregt, Ligtenberg, & Wachowicz, 2012;Taczanowska, Muhar, & Brandenburg, 2008;D'Antonio et al, 2010;Leung, Walden-Schriener, & Miller, 2012).…”