It will last as long as your freezer will in theory. You could always put the whole tray in a cooler and pack some ice around it if you're worried about it going bad between boils. If it's a couple days you'll be fine, If it's a week or more then you'll likely have problems. Whatever you do, keep it out of the sun or away from anything that the sun will heat up.
6th season solo sugar maker in a young sugar bush of mostly red maples
320 taps
2x6 self built arch, Flat pans w/ dividers
New 12x16 sugar house
CDL hobby 250 RO