There are a number of other hiking trails on Manitoulin Island, which we haven't explored. I imagine that the total number of islands in lakes in islands in lakes around the world must be fairly limited. There may be a few other examples. I was born and raised there and can attest to the fact that the lack of chains in terms of restaurants and motels is a definite plus, and I can also attest that your expectation of their being more expensive is definitely incorrect. The motels are priced reasonably in line with any other motel chain, in fact they might be less expensive in some cases.
Restaurants have good menus and serve good and reasonably priced food.
Of course, there are good and bad spots to eat and less expensive and more expensive places to eat.