Maybe do some call blasting using local prey animal calls… maybe some provisioned sites with fresh, unscented dirt for tracks and local fruits, injected with some local brew… set out some camera traps… hire some locals for tree standing, night river runs and combing areas for tracks… locate a site to start making mechanical sounds… pass out hundreds of disposable cameras to locals who routinely venture in the same areas of the sightings, with a posted reward for anyone getting a picture of the beast(s)…

It would be fun.