We have been there twice.
First Mid July. Wore Long underwear, under the Polartec , under the Goretex. Along with Gloves Hat and scarf. Yes Cold and wet. Yet they kept telling us the week before was 80 degrees and sunny. Lots of people,
The Second time we went early April. Trans-Pacific cruise. I was a balmy 60-70. Mostly Sunny. Zip crowds.
Reality is Alaska is a fickle lady.
Crowds will be there during the summer months.