Yeah im lucky in the fact that half of my maple trees are running along an old stone wall fence with southern exposure to a hay field so they produce really well. I always figure .33GPT per year but have exceeded that the past few years. I should get a sap hydrometer one of these days but i tend to be around that 40:1 ratio for the most part.
I was surprised to come home to about 25 gallons of sap yesterday, unfortunately i am away this weekend and wont be able to boil until Monday night or Tuesday. Hopefully the sap stays as its supposed to remain fairly cold. its looking like Monday might be a good day for more sap as well. If the sap looks questionable i might end up dumping it as im pretty far ahead this year. I have to resweeten my pans anyways and then its looking cold for the next week or two. Will wait and see how things pan out.