Spent quite a few summers in the UP of Michigan and it is beautiful. Deet works good but.......these little flying creatures of the spring and early summer do not bother with me. But, boy do they LOVE my DW. Found a product that worked great for her. But get them early as they always sell out fast in the UP during the summer.
They're called ThermoCell. They can be found at WalMart, Lowes, Menards, etc.
Here's a link to Amazon that will tell you what they are.
Don't let the bugs keep you away from this area of the country. There is a LOT to do and see from Waterfalls to Hiking, fishing, kayaking/canoeing, National Lakeshore, Hiawatha National Forest campgrounds and great towns to explore.
They do work!