Sadly I travelled everywhere without my passport, the license always worked, until it didn't, in Bangkok and it was crackdown time....need passport......raining 9.00 pm at night and every hotel turned me away, I was due to fly out in the morning.....asked a cabbie to find me a place close to the airport and I got a 600 baht cab ride in the opposite direction....most miserable night in my life in the most disgusting room available....do not recommend.....do not get caught like me, take your passport