I'm in St George and I may have to freshen up my taps...I shudder at this as the CV2 spiles I have keep losing their tips when I pull them.
My fire box is 28" deep which may have an effect, I was pushing the coals back and adding wood to the front but then I started spreading everything and it got better. I have natural air going under the entire grate but it comes in through a draft door so the dead spot is in the very front.
2014 - 6 buckets, 4 coffee cans and a propane burner - almost 40L of sap and 1.6L of syrup
2015 - 103 taps on gravity. Homemade oil tank arch and a Smoky Lake 2' X 5' hybrid. - 2.66 gallons of syrup
2016 - 101 taps, 550 gallons of sap, ~10 gallons of syrup all dark.
2017 - 138 taps, 225 gallons of sap, 5.55 gallons of dark syrup, still procrastinating on the vac.
2018 - ~150 taps, I lost track of the sap it was incredible!, over 20 gal of syrup, all dark.