Don't you think to change to Chaing Rai to avoid crowded.
I agree that Chiang Rai is a very nice place to travel with less touristy compared to Chiang Mai. I also like a nice atmosphere and green scenery of Chiang Rai. However, I think there's a lot more to do in Chiang Mai and things are closer together.. Still, it depends on your travel style. For those who come to Thailand for the first time might want to go places that a bit for tourists, while others who have been to Thailand more than one time prefer places that out-the-beaten track.