You can pack in the veg bc it is sugared, which draws out the liquid, then drained. So, 8-9 C zucchini then 1 cup sugar, mix it up, then drain in a colander for at least 30 min. It is a cake recipe, so it bakes up best in a cake pan, rather than a loaf pan.
Zucchini ( and summer squash thats yellow):
Dehydrate it with some seasonings on thin slices.
Squash fritters freeze well.
Cake: my recipe for a 9x13 or double layer cake uses 8 C shredded veg per recipe. It gets tossed with some sugar, then drain it for 30 min so excess liquid leaves...