You're almost there !
Clean up all old wood remnant. Be careful not to go through the skin! Grind glass clean. I used (2) 1/2" pcs of ply glassed together but you can use (1) pc of 3/4" I guess.
You don't need to vacuum bag. Use a flat table, and when you set new wood on top of 3-4 plys of wetted mat ( laminate resin ) - you'll use clamps and cross pcs of wood to sandwich the new wood down to the skin. Let kick, then glass on top and your done.
The replacement wood - I'd make it 1-2" shorter on all sides than the area you're covering - angle it on all (4) edges so it does not make a sharp angle against the skin.
On your final glassing, covering the wood, in addition to covering the wood and skin, cut 3-5 extra strips of mat to add additional mat to the area where the wood is not ( the 1-2" ) along the (4) edges - this way, you'll never drill through wood core again...
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