The best months are March, April, May and the last week in September to mid-December. The busiest season is October. Limits are the monsoon (June to September) and winter snow and lodge closures (Larkya Phedi, Bimtang) from some time in Dec
This short tour is a combination of a number of exciting good events. You start with a helicopter ride trek a bit, enjoy a picnic, bath at the waterfall in the very first day.
This shares the same goodness from the short and sassy wilderness experience in the initial 2 days.