The best benefit about vacationing on an island is that bears, wolves and other bothersome animals wont stress you out or inhibit your vacation. That doesn't mean you won't see any wildlife. Bear, deer, moose and even bald eagles (the last couple years especially) along with all other northern wildlife can be seen from the dock. It's all about being in the right place right time.
Unique, how about watching tv on the dock while having a fire or fishing. Watching your favorite show or sporting event while watching the kids swim and play at the beach.
Oh ya did I mention the whole island has wireless internet.
I almost forgot there is also the BIG benefit of less bugs compared to the mainland (on average 2/3 less) . I also fog the island twice a year and have a propane mosquito trap that runs 24/7 all summer.