The ideal weather for syrup is days that come up into the positive numbers, and nights that are below zero. The change in pressure within the tree as the wood expands and shrinks acts as a "pump" to draw the sap up the tree in the day time, and shunt it back down to the roots when it chills at night. With the freaky weather we've been having, the sap has probably been flowing most of the week, and will next week too, but Dar's not ready to tap the trees yet, so I'll patiently wait for her go ahead.
In the mean time I'll be contacting local restaurants to see if I can get food grade pails for free. Failing that I can buy some at Home Depot or TSC.