Lisa - Do you freeze those vanilla beans too? I heard that was not good for them. I have a couple of pounds and they are fine at room temperature so far but they are only about a year old right now.
I use mylar bags and 02 absorbers for most of my dried herbs and spices (so I don't vacuum) - so far so good and that method saves freezer space - but I am sure freezing them in airtight containers/bags would also work.