Voyageurs National Park shares several things in common with Isle Royale National Park. Both share a similar northwoods ecosystem. Both have water as a major component of the park. Both are the closest national park to each other.
Where as Isle Royale is mostly wilderness, Voyageurs is very much recreational park which allows motorboats and fishing. In fact, there are still several resorts on the lake which are throwbacks to before the park was established in 1975.
Voyageurs is about a 5 hour drive from Minneapolis or a 10-30 minute drive from International Falls, MN, depending on which visitor center you go to.
The best way to visit the park is probably by kayak or canoe. There are many campsites around the park as well as trails used to portage your canoe.
If you visit the park without a boat, then I highly suggest taking the Kettle Falls tour. This is a 5.5 hour boat tour run by the park service which takes you through the park to Kettle Falls. Kettle Falls is the location of a hotel which was built in the early 1900’s and is one of the few places where you can stand in the US and look south into Canada!
Given the odd nature of the border with the US and Canada in this area, you will almost certainly technically cross into Canada briefly on the way to Kettle Falls.
Unlike the really popular national parks like Yellowstone and the Grand Canyon, the visitors here were almost all American. This is truly one of the hidden gems in the national park system.