WHERE -- Thailand WHEN -- Nov. 22 to 29 HOW MUCH -- $ 2,998 Backroads , ( 800 ) 462-2848 ; www.backroads.com , based in Berkeley , Calif. , is offering this eight-day trip starting in Chiang Mai and traveling northeast to the Golden Triangle region , where the Sop Ruak and Mekong Rivers meet at Thailand 's border with Laos and Myanmar .