I love to get out on the water on my kayak, and I've always wanted to place a cache on an island, so here it is.
The easiest place to get onto the island is around the south and east sides, N39 30.118 W84 02.542 but watch out for submerged trees as you approach
. Once you're on the island it shouldn't be too hard to find the cache. Despite the difficult access, this seems to be a popular place for muggles, so please conceal it well. Have fun!