I just went out and 'pulled the plug'.
I'll fill it again before I load out on Friday.
Then drain it again at the track Friday night.
I may have a garage to keep it in Saturday night.
If not, draining and refilling is not that big of a deal.
Also, for those that would like to follow our season ender:
Specialty Timing - Lemons Live Timing
Arse-Freeze-Apalooza - 2013 - 24 Hours of LeMons
KT