Like most, you probably have your boat stern-out. If it's possible with that lift, I'd put the bow facing out to minimize any surging action.
You don't advise us what design of hull it is, or what design of lift, but I had a 20' boat on a lift just a few inches above the lake as well.
It really doesn't matter how heavy the boat is, you don't want wakes to reach as far up as the entire waterline of your boat all at once, and even once. If it's ever been shoved on its bunks at all, something definitely needs to get done. Even behind a breakwater, some combinations of wakes can "surge" the lake's level like a tide.
If you're still concerned, secure the boat to the lift with heavy lines and put out temporary, well-set, anchors. Use the longest rodes you can get away with for that location.
It would still be nerve-wracking to watch, but you could just put the boat out on a borrowed mooring for that one event.
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