If you don't already have one, get a chart-plotter with the Beiser chip. Mine showed a lot of specific rocks to avoid. Yours may already be listed.
Any rocks that are too big to move without heavy lift gear should be left alone. Mark it with a piece of fat PVC and write the work "ROCK" on it. If ballast it with some cement it will float straight up and down.
This will probably last all season but remember to take it in, in the fall.
Good luck!
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