A 3days2nights trip is definitely not enough for the trip. 4d3n will be best!
ChiangMai,
1st Tips: a meter taxi is preferred to move to your Hotel.!
2nd Tips: Do not ever take the package offered by the driver. Do find a local tour if you willing to travel at ChiangMai itself first.
My Fault: Did pay 1000Baht JUST for the gasoline on very first day to the driver. He sent us to Elephant training Park (Entrance Fee: 1630Baht/person including Elephant and Cow riding, Rafting, lunch buffet & Elephant Show ONLY), then Tiger KINGDOM (Entrance Fee depends the tiger size, around 800Baht), lastly to Underground Temple (We paid 300Baht/person for the horse riding to visit the temple *This is really a bad idea & I believe the driver cheated us A lot!)
Lunch Buffet + Elephant Garden
2nd Day (ChiangRai):
I learnt from mistakes and follow a tour to ChiangRai. I did bargain from 1400Baht to 1250Baht/person including Lunch buffet, Hot Spring, White Temple, Long-necked Temple, Mae Sai, Golden Triangle with boat trip!
Hot Spring
Departing to the Golden Triangle side, Mekong river
Golden Triangle, LAOS