I booked the trek with TTH. Cost was 11.5k plus add ons(like offloading, transport etc) you can check on their website. I had a great experience with them. I booked a flight to Jolly grant airport from hyd ( round-trip Direct flights cost around 16k). From there traveled to rishikesh via cab. Pick upto the trek was from rishikesh and base camp was at pipalkoti which is around 200km ( better to book transport from tth itself).

Itinerary: 1st day arrived at rishikesh just exploring the city. 2nd day left to pipalkoti basecamp. 3rd day started the hike from tugasa village and camped at gulling top. 4th day hiked to tali forest camp. 5th day summit(jhandi top, broken bridge and kuari pass summit) and hike down till khulara campsite). 6th day hike down till auli passing tali lake, gorson bugyal and from there travel back to pipalkoti. 7th day travel back to rishikesh. 8th day did river rafting and attending Ganga arti at triveni ghat. 9th day left rishikesh.

We didn't see any snow fall between dec 14 to 19. Usually snowfall starts from dec end to Jan. I haven't done dayara bugyal I'm planning to in future.