How long does it take for a tree to thaw??

[TwinBay]

Tapping in Parry Sound- waiting till March 2nd
Past week has been -20 or better at night.
Early next week shows highs and low around 0 and -5.

Or should we tap this weekend just in case?
Buckets only-- 125 total

[DrTimPerkins]

Double-posted thread. See http://mapletrader.com/community/showthread.php?19075-How-long-does-it-take-a-tree-to-thaw