Speaking from a year in Yakutat AK, the sun sets about 10-11 PM and rises about 2-3 AM and it never gets really dark. During the night time hours it just appears to be really like dusk. Yakutat is about 350 miles northwest of Juneau on the Gulf of Alaska. You'll have pleanty of light to take pictures and probably plenty of rain/mist also. The year I was there we had solid sunshine only 14 days of the year and rain/drizzle/mist/snow the rest of the year. Everytime the sun would shine we granted "SUNSHINE LIBERTY" and took the day off. It was a great time to enjoy the beauties of Alaska. You guys will love it.