You are looking for a container over the water.
This cache is intended to be retrieved by canoe, kayak, or other type of small water vessel. No need to wander onto any private property.
Take a boat ride on Lyons Creek and enjoy the wildlife. If rated 4.5 you should be able to reach sitting in Kayak, if rated 5 you may have to stand up to reach cache.
Please bring your own pen.
Congratulations to Carni for FTF