citrus fruit freeze well. When thawed they release their juice readily.
The outer coating i.e zest of fruits, being basically oil rather then water, serves are an impermeable vapour barrier so that citrus freeze well for months.
If the fruit is zested, I would suggest you freeze the fruit in a resealable bag or even aluminum paper. I should last a while until you require some juice.
Zest of frozen fruit is useless. I have had mixed results when trying to freeze zest.
I eat science everyday, do you?