We returned from Tobago earlier today. We saw this 'guide' 3 times during our week stay, once in the same spot that Helen described, once outsiide the Coco Reef Hotel and also actually on the Store Bay Beach Facility.
The only time he spoke to use was outside the Coco Reef where he was as Helen said looking into the trees with binoculars making 'bird-call' type noises. He also asked us the same question about going to the rainforest. However, after a bit of banter, we certainly didn't have trouble getting away from him or was he rude or abusive. One trick he does use is if you say 'No' he offers to give you a flyer, as he opens his car door he remembers that he has run out of flyers and shows you photographs of people suposidly enjoyinng themselves on a trip to the rainforest. However, I'm not sure whether this was one of his trips as the few photos that we bothered to look at, he wasn't in the picture of any of them!!!
This must be the same person, this man was no more than 5' 8" ( approx 170 cm) short beard, dressed in green polo shirt with some kind of emblem and drove a small jeep type 4x4.