Can I go to Tiger Leaping Gorge from Lugu Lake? Are there buses available?

Well, there is no direct coach between the two, and you need to make a transfer in Lijiang. First, take a coach to LJ from Luguhu Bus Station for CNY 103. The coach departs at 9:30, and the duration is about 7 hours. Then, take a coach to Hutiaoxia Township for about CNY 25. The coaches depart at 8:00 and 8:30, and the duration is 2 to 3 hours. Upon arrival, take a taxi to the gorge for about CNY 30.

How many days should I spend on the lake?

Including transporting from LJ to/from the lake, and travelling around. What are the bus timings that depart for LJ?

You are advised to spend three days and two nights. Actuallly, two schedules from the lake to LJ at 10:00 and 12:00, and for back trip, there are also two schedules, at 09:00 and 10:00. Plan well and catch them!