“…Typically, the natural and social carrying capacity of the investigated sites, as well as desired visitor satisfaction, have been the primary motivations for the ongoing development of visitor monitoring techniques in recreational sites ( Pickering et al, 2018 ). Recently, a new context for visitor surveillance has been introduced in the context of public health preparedness planning ( Schneider, Budruk, et al, 2021 ; Schneider, Lindsey, et al, 2021 ). To capture the extent and characteristics of recreational use, studies of outdoor recreation have employed a variety of monitoring methods: direct and indirect observation, automated counting devices, visitor tracking, access permit and ticket counting, surveys, self-registration, internet-based user-generated content, traces of use ( Akehurst, 2009 ; Bielański et al, 2018 ; Cessford & Muhar, 2003 ; D'Antonio et al, 2013 ; Korpilo et al, 2017 ; Taczanowska et al, 2014 ).…”