Is it stored outside?
I would at least drain it and pull it around on the trailer to make sure you get the waters out of the little pockets in the engine. I'm overly cautious about these things. But, then again, I have never had a block freeze as a result of my method.
Previous: 1993 Prostar 205
Red 1998 Ski Nautique, PCM GT40, 310 hp, , Acme 4 blade, Perfect Pass SG/Zbox.
Be kind. Have fun.