Pretty much, yes! Native coterie members/the leaders (or even just some of the regular locals) will be able to give characters a good idea of where to find their marks if they aren't already detailed on the map or the quest posting itself. In some cases it might end up really being as vague as "oh, those? They're just all over the place" or "Those show up wherever the jungle is the most dense" and you'll have to do some searching, but generally they shouldn't have any trouble finding someone who can point them in the right direction.