In the lower peninsula of Michigan, there are some timeshares in the Harbor Cove/Bay Harbor area and Traverse City area that are good places to explore for nearby regions. Traverse City would get you close to Sleeping Bear Dunes which is a very interesting place. Harbor Cove is only about an hour from the Mackinac Bridge and Mackinac Island and is beautiful in the surrounding region.
There are no timeshares in the Upper Peninsula of Michigan, but Pictured Rocks is certainly worth a few days. I also love the Keweenaw peninsula in the northwest corner of Michigan. In my opinion, this is certainly worth going a bit out of your way to see.
The UP of Michigan is a great place to hang out for a few days. If you are going to go to Pictured Rocks, I would suggest spending at least one night in Marquette. No resorts, but many hotels. It’s a college town, but it the “Capitol” of the UP. Great places to visit around Marquette is Sugar Loaf Mnt, the Black Rockscof Presque Isle Park (if brave enough, you can cliff dive/jump into Superior). If you are into old movies, you can visit Big Bay (45 minutes North). The events of the Jimmy Stewart movie Anatomy of a Murder took place. The bullet hole is still there where the murder (Lumberjack Inn) and where the movie was filmed (Big Bay Inn).
If you like craft beer, Blackrocks and Ore Dock Breweries are very good. There are so many good restaurants, but the Portside Inn is a great place for casual food. Get their breadsticks.
Heading east near Sault St. Marie, Tahquamenom Fall s is really impressive and the Great Lakes Shipwreck Museum has an awesome Edmund Fitzgerald display. You can sit on the beach and watch ships heading toward the Soo Locks. A trip to Mackinac Island is a must. You can bike around the island (no motors cars are allowed, have some fudge, and grab a drink at The Pink Pony. A trip around Historic Fort Michilinacinac is fun if you are a history buff. They have an active archeological dig on site.
Traverse City could be a post if it’s own, but the wineries are a must (we LOVE the Old Mission Peninsula Winery). The Apache Trout Grill is great. You take a trip on the Tall Ship Manitou. They gave dinner cruises, ice cream cruises and even an overnight cruise.
Going further south along Lake Michigan, Grand Haven and Saugatuk are worth a visit as well.
If you need anymore ideas on Michigan, ask me. I’m a life long Michigander who has lived all around the state.