My last batch of hophornbeam was cut in sept-oct. The bark was stuck tight, but it's so thin that it is a joy to work and goes quickly.
I had several logs, kerfed and split them, then removed bark, sealed the back and put them right in my shop, which is air conditioned and has a dehumidifier running. I didn't lose a single piece to checking or warping. These logs were very straight grained to begin with.