Thanks! Will I need to leave some space for expansion when frozen?
No, I never have.
I only put red, brown & black in the freezer. White I put on a shelf in the garage and cover it from light. 1 oxygen absorber and 1 desiccant per jar. Then I write the date on the jar so I can rotate stock.
BTW, if you don’t have a rice cooker, you want one. I’ve been using them for 20 years. Korean made are the best, Japanese the next best, and Chinese are last.