A bit more research would have been sensible but after Weaw put us on the bus and us eventually passing all the casinos in the area, someone had his eyes on us before we reached the "outdoor visa desk" manned by a flirticious officer, and an official guard who lied about the guide's identity. We went on a small excusion to a remote transport terminal and (apparently) scared the taxi driver by being ultra-alert; should have insisted on the "do not talk to any stranger at the border crossing" principle.