We never had any problems with wood.
The type of antifreeze you want is often called "RV Antifreeze" because it's used in the fresh water systems of recreational vehicles. Available in hardware stores.
Search the house for liquids when you close up. Don't forget paints and spray cans. Last year we missed a can of diet coke and it exploded causing a mess. We put anything in question in the shower as someone mentioned above. Most things make it OK.
Unplug your fridge and prop the doors open to prevent mildew. You can close the fridge if you leave an open can of coffee inside. Drain any icemaker.
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