Kalkaska is one of the few communities up north that is working for community-wide free Wifi. If you have to drive a bit, that in itself is worth the trip! Here are a few ideas - but there is so much more that you can save for future trips with your friends. There are many things to do in the entire Grand Traverse region - just depends on your interests. I currently live in Traverse City - moving back to Michigan a few years ago from Colorado.
Your cabin in Kalkaska sounds great! I've had a cabin in the Kalkaska area (nice small towns, friendly people, land/forests, lakes) - where you are really 'Up North'.