It's high up in the mountain, it will still be cold in the summer. But Jiuzhaigou is beauty in different seasons, if you want to experience the full beauty. you may need to visit the place in 4 different season.

It is extremely far from Huanglong to Jiuzhaigou, 4 hours of ride. The cab will be too happy to take you, pls don't take a cab, arrange a package will be better and cost saving.

There are 2 5-star hotels there, Inter-Con and Sheraton. Sheraton is walking distance from the entrance to Jiuzhaigou, but there are plenty 3 and 4 stars hotel there. just to remind that the star is one less down compare to city hotels.

2 full days are just fine at Jiuzhaigou, first day travel by bus from spot to spot and take some pictures. 2nd day if you're not tired go for a walk, you will lose plenty of weight.

at Huanglong, due to the high region. you may suffer some high altitude sickness, e.g: lack of breathe, ggiddiness. Just take plenty of rest there