No worries... there is a lot of space in and around wood cells. there is a lot of room for expansion.
after all there are trees in -30 weather.
but he loss of freezer space would worry me.....
but it is I think a solid way of keeping wood fresh. same way to keep green coffee beans fresh for a lot longer than they would normally last. very well sealed of course.
I keep my wood in the cool basement, humidity is ~45-50% all year. I think it's ideal for wood...
hmm, I might put a couple of pieces in my wine cellar just to see what happens in 6-12 months.... the humidity there is a lot higher though.... i'd have to keep an eye out for mold