Travel in Sichuan questions

1---Jiuzhaigou National Park

2.---Mt.Siguniangshan (Four Maiden's Mountain) Scenic Area

3---Daocheng Yading Natural Reserve

4---Huanglong Scenic and Historic Interest Area.

I may travel to the above destination.
1---If i take Sightseeing Bus to travel in Sichuan.
How long i can sightseeing in the destination?
will it be so rush n short about 30 minit to sightseeing or 1 hour or more ?

2---or better i take long distance bus so that i can stay in the near by guesthouse
and take a long time sightseeing in the destination.

I appreciate your reply n make my journey to Sichuan will be more convenient.
Thank you.

Tan Li Li from Malaysia
4-12-2013