Not a Problem Here
We get huge wakes from the July 4 fireworks watchers here too ... almost seems like the ocean surf as many boats go by on their way home from the fireworks.
However, we keep our 21' boat on a lift and we have never had a problem from the wakes. In your case, 4" of clearance between the lake surface and the bunks doesn't seem like much, though. We probably have twice that clearance. The legs of our lift are adjustable, and I assume the legs on your lift are as well. Before the July 4 wakes hit, could you adjust the legs on your lift and increase the clearance between the lake and the bunks?
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DRH
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