Sorry for reply so late , because I'm very busy these week.
Maehongson don't in Chiangmai but it's near Chiangmai Province. It's very scenic. U can come chiangmai next year in february because Chiangmai have flower fastival on 8th fabruary past. I'm thing U like it. Pai District in Maehongson Province. It's very scenic too.
I'm sorry thing your friend is your sister. I'm happy for help people because it's fell happiness and development me.