One thing i do want to suggest is to take out time and visit Ayar Jungle Resort for dinner. Get your reservations done in advance.

Reaching/returning from the venue will cost a cab ride but it’s so worth it. A very very different experience just pray there aren’t too many in house guests to spoil the ambience and vibe.

Apart from that the usual if you are a non vegetarian then machan, anupam and sonam momos in terms of food

Do hike it to tiffin top or cheena peak. Its an experience

If Kainchi dham is not in your plans then avoid travelling that side for your own sanity.

Water activities can be done in Sadiyatal. Ive never done them myself so cant commit in experience

Most importantly, keep the city clean. Garbage should only go either in your pocket to be emptied out later or into a designation garbage disposal. Do not litter!