the battle to keep sap cold is one that all weekend boilers fight... but in the end the only answer is to boil asap. I have buried containers in snow, covered with insulation and even then 70 degree weather you need to boil that day. Some will take jugs and fill them with sap and freeze them in the freezer, then drop into the sap. This helps for marginal days, but likely not for several 70deg days. I had considered making a cold storage location set into a hillside like a root cellar, but in the end opted to just boil as soon as I can. It means some sleepless nights and bleary days at work, but really is the only solution for me.
Good luck and I know how sad it is dumping sap
31 Taps in 2011 with buckets, Barrel evap
45+ Taps for 2012 with buckets, 2x5 Dryer Arch with steel pans ! 8x11 Sugar Shack, Dump Stations,
60 Taps for 2013- Insulated Dryer arch, AUF,
2014 watched from sidelines...
70 Taps for 2015 - dryer arch, new 2x5 divided pan from Smokey Lake with a float box !
70 Taps for 2016 - added a preheater and new grates for the Dryerator.
80 Taps for 2018 - Dryer arch got new front and door