i would check the safe temp range for the 2-way humidity control... do boveda packs even work at freezing temps?
Light and exposure to O2 are the concerns, but you also don't want anaerobic bacteria growing, that's whay you see those "n2 replacement" storage options. get all the air out as best you can. vacuum seal is an option too but it will compress the buds a bit. they do fluff back up.
Cold is good. Freezer is fine as long as you don't agitate it. trichomes are brittle at cold temps. If it can sit there without being constantly touched, moved, or otherwise physically agitated, it's fine.
For up to 1 year, you don't have to be so anal, but might see a difference the last month or two by comparison to just a bucket or bag with 2-way humidity control. I am settling into a yearly cycle. LEftovers from previous year get made into bubble hash. I'm just starting to make use of a vacuum sealer. no fridge or freezer though. will see how much that helps in 5-6 months