Freeze warning - Yamaha F115 4-Stroke question

[wildcat99]

Yamaha 2005 F115 4-Stroke on a Stratos 180FS fish/ski, on the trailer and stored outside. It's supposed to freeze tonight 27F, but get back in the 70s this weekend and plan on using it then. Don't want to do a full winterize/dewinterize before then. I blew out the flush line on the motor and livewell lines and will do a full winterization...change lower unit gear lube, oil, fog, etc when it's time to put away for winter.

Question: Do I need to do anything else before this light freeze...put a blanky over the motor, loosen the lower unit plug for freeze expansion...any advice?

Thanks for your help!