hi,
We did not crossed the glacier, track which we used took us toward the view point and ended there, we hiked for almost a hour to reach the viewpoint, from where you can view both trashing and rupal valley. I think we were on wrong track because when we reached view point we saw another jeep track going toward rupal from tarshing side.
We left Tarshing in morning and reached bara pani late in the evening. Because due to land sliding road from chilum to deosai was closed and we waited for at least 2 hours in chilum. If i remember correctly We left tarshing around 08:30, we reached chilum around 11-00 am and left chilum around 01-15 and reached sheosar lake around 02-00 pm. After stay of an hour at the lake we left sheosar around 03-00 pm and reached bara pani around 05-45 pm. But one more thing you need to consider is that we made many stops after we left chilum. I would recommend to keep a full day in your schedule for tarshing to barapani.