carry on packing - i would add don't forget essentials like any medications and expensive/precious items ie: jewelry if your bag is checked in case it's lost!
When to visit northern Thailand chart by months. This might be helpful in deciding when to visit northern Thailand. Weather, temperatures, rainfall, events, pros, cons and advice.
Travel Keepsake Kits. I always have the best intentions of making photo books when I come back from fun trips but it rarely ever happens. A fun keepsake kit to hold maps, ticket stubs, and other fun mementos is an awesome alternative!