I am going to be honest, not the greatest lake to kayak, difficult to find a good launch spot (particularly in the summer), and not a lot of great places to hide a cache really. We paddled along looking for a few, I had three caches with me but ended up hiding just one.
In a kayak or canoe you can land here, you will have to get out of your watercraft, but the cache should remain in good stead and hopefully a quick find when there.