Hey Rahul, yes Bro it can be done ... and from Barshaini village .. it takes around 13 Kms of trek and can be done in Maximum 5 hours ... Happy Trekking Bro!!!
Hey Rahul, Kheerganga trek is 14Km from Barsheini. Yes, you can do kheerganga in winters but carry winter clothes like downjacket, woolen socks, woolen cap, gloves,warm inners, moisturizer, first-aid kit etc. This is my simple itinerary of Parvati Valley with Kheerganga info : https://www.tripoto.com/trip/covertheparvativalleyin7days-5bab66898dbe9?ref=mobwapp&source=awp Hope this would help you. Happy traveling!!