You can cluster the pots in a protected area during the coldest months for added insulation, especially from freezing wind. Mint and lemon balm will die back and reemerge in the spring. Sage and oregano might not even lose their leaves — VERY important that you do not allow their roots to get waterlogged, that will kill them faster than cold. I've never had success with thyme in pots but it is hardy in zone 7.
Chamomile — might depend on which one. Here's an article
https://www.hgtv.com/outdoors/...
