I understand the needs of some to be "a part" of the Lake forever. Several of my relatives have been put to rest "in the lake", not my choice, but other relatives'.
For those that want to connect to the Lake, I would suggest some of the land based cemeteries that ancestors could visit in years to come when they visit the Lake. It might cost a few pennies more, but you will be there forever. In the year 2212 your ancestors can come to your gravesite and say, "there's my GGGGGreat grandmother, she really loved the lake."