Travel in Yunnan

1.Tiger Leaping Gorge. 2.Dukezong Tibetan Ancient Town
3.Songzanlin Temple. 4.Putachou National Park 5.Lugu Lake
6.Jade Snow Mountain 7.Heilong Lake
May i know that
1.It there very difficult to travel above destination by local bus during Disember period since it is winter period?
2.Is the above destination too cold / extremly cold to visit during Disember period since it is winter period?
3.Or it is ok to wear on the winter jacket during my visit the the above destination?or any suggestion?
4.Is the guesthouse there is OK and provide warm condition to keep us stay warm during Disember period since it is winter period?
I appreciate your reply n make my journey to Sichuan will be more convenient. Thank you.
Tan Li Li From Malaysia. 9-Disember-2013