best route to chiang mai

Dec 28, 2007
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Heading up to chiang mai from phnom penh, cambodia next week (as soon as the fridge is empty and the new year hangover has passed) for a month of loops. Will be crossing over via koh kong, can you please advise the best route up, avoiding Bangkok, there looks to be a few different options, so i would appreciate some advice.

Have a great new year and keep it shiney side up.