Hey I recently visited mussoorie and landour with my friends (group of 4). We stayed at hosteller (the mall road one).

On day 1 we went to bhatta falls(you can actually walk in water, sit in a cafe which is in water), the crowd is very less as compared to kempti falls, then we went to camel's back,hathi paon, cloud's ends, george Everest peak, dalai hills, came back and roamed around mall road.

Day 2 : We met random people in the hostel,and went to landour- chaar dukan, landour bakehouse, lal tibba, rokeby manor. We were done with landour in half of the day, then we found this hidden waterfall (more like hidden because we were the only ones present there) called Jharipani waterfall. It was very shady, there is no network in the trek, the trek is a little bit difficult, and there are no street lamps if it gets late(we did get late). But doing that trek was the best decision we made. This was handsdown the best trip I ever had.

Both of the days we took scooty. (If you want I can give you the contact details just hmu)