Did AK in July a few years ago. Can vouch for the Denali fly over. We went out of Talkeetna. The flight (C185) was supposed to land on a glacier but weather was not conducive, but it was worth it to be at 15K and still looking up at the mountain.
Took a float Beaver from Sitka (?) to a lake landing 30 minutes away. The island had a blind on a river where the bear would reach in, grab a salmon, eat the good stuff and toss the rest. We were literally 20-30 feet away.
Helicopter tour in Juneau was cancelled due to low ceilings.
Enjoy, but the weather might crimp some of your plans.