Is there any current in the area that you would be anchored? Could be an issue.
Wondered. In my case, the water where we were renting a cabin at was maybe 3 feet deep all the way across. At low water. High water, about 11 feet. And it changes in about 30-35 minutes' time, and so does the current. In low water, you're barely moving if any at all. High water, current is moving along at around 8.5 mph. Everything I've thought of would be almost useless in conditions like that.
The locals build floating docks that the boat is tied to. Problem solved. The dock is tied (cabled) to shore anchors both upstream of the dock and as the water level changes the dock floats. It's hinged at the shoreline. Some of them are really simple; like an old modified pontoon boat (no motor obviously) with a wooden walkway.
When I was younger, we used to camp on the boat on the Missouri River between Iowa and Nebraska. When we were staying the night, we'd pull up on a sandbar. Water level would rise or fall a little. Or sometimes a lot if a barge came through. Long as it was tied and/or anchored it was fine. That was a 27' Carver, so not a small tin boat at all. But the waves from the barges were enough to wash over the stern on occasion. Remember them well. You didn't need to be on the river in a small boat when barge traffic was heavy.