Adjust your expactions when it comes to visiting tribes, particulary the Karen long neck in Chiang Mai province. Reguardless which tour guide you take every tourist is bought to thebsame place a so called Long neck village where you won t see more than 3 or 4 women that have long necks. They will have exhibited some souvenir you can buy. I felt like i was in a human zoo. There was nothing authentic but how can it be when developed world came also to them. I think one has better chance seeing such people close to the burmese border.