Making your trek during December is often very Challenging and bit Risky. But we made our trek to Panch Pokhari via Chyochyo Kharka ( rarely use trail). It was one of my remarkable treks till now. But we do not want to recommend trekking during December and January. It will be full of snow which makes you difficult to walk.
promoting Wai wai Noodles
Getting bus from old bus park to Sano Okhreni but during monsoon bus will not operate to Sano Okhreni (check before your trek). From Sano Okhreni to LamiDanwa takes and 25 minutes walk, where you can find a local lodges (may be 2,3 lodges) and this is also check post to enter Lantang National Park. But we choose to hike up to Maidan for an 1 hours for our stay.
This location offers us a beautiful sunrise view with Nepali Dal Bhat. Next Day our Trek start for Chyochyo Kharka (Chyochyo hills or Dada) known by Hatidhunga. This hill is considered as old Panch Pokhari by Local peoples.
Due to heavy snow fall we were not able to walk, our foot was almost freeze and difficult to make your step a head. It took more than normal hour to reach next destination point like Saddle Kharka, almost a day to reach at Hile Bhanjyang and next day to reach Nosyampati.

Here is our Time table :
Maidan to Saddle Kharka (near ) -full day
Saddle Kharka (near) to somewhere -full day
Somewhere to Nosyampati -full day
Nosyampati to Panch Pokahri to Bhotang -full day with extreme walk

Our plan was to connect to Ama Yangri Trek due too much pain in legs and snow cause a serious issues to our both legs (not frost bite). Here is picture.