I used to know a transplanted farmer's daughter who made the greatest pickles (and jams)!
(Rest In Peace, Gracie.)
Once I drove her to the 'Eastside' (of the Cascades) to buy her bushels of cukes & fruits.
As soon as she bought them, she would dump them in an ice chest.
"You have to keep them cool, or they'll turn mushy." were her words.
So, if it takes you several days to harvest
enough for a batch, store them in the 'fridge.
And, YES. She used to put in pieces of grape leaves in each jar.