Kuari pass trek is 5 day trek where you get to see Nanda Devi view. It is an easy trek which starts from Dhak village. Brahmatal trek shows you lovely nature where january has snow trails. If you are lucky you get to view Trishul and Nandaghunti. The best part of this trek is, you get to view the most famous alpine lake and camp around. Both treks are lovely treks, see if you can cover both with gaps. First choice I would suggest is Brahmatal trek.