so i have been to the touristy places in lhasa before (potala palace, jokhang temple and lake yamdrok). since i have a chance to stop in lhasa again for 4-5 days i'm thinking about lake namtso, just hanging around lhasa, yumbulangkang and such, but all the join in group tours i've seen include the usual potala, jokhang, etc.. it seems to me that all the tours are tailored towards first timers, so if you guys have been to lhasa before, what do you do?!! go on the same tour again with 1 or 2 new places? or do you guys just have money to hire a private tour guide?