Welcome to the land of the Midnight Sun where it is daylight over 20 hours a day! It is magical and your children won’t want to sleep until it gets (somewhat) dark. However, we do have some activities that are guaranteed to wear them out so that when they do go to sleep, they will sleep well.
When you arrive in Talkeetna, you can also ask your hotel staff or lodging owners for ideas and information. Have fun!