As above, you can use dry-plate holders with wet-plate but you need to take certain precautions. You need to protect the wood, as it will slowly disintegrate because of the Silver Nitrate. The fabric in the light trap will also dissolve and there is not very much you can do about this.
"Oysters" are a serious problem with dry-plate holders. Oysters are the light-colored deposits of scum on the plate. As the plates slowly dry in the holder they wick moisture from the sides and rear of the plate towards the front. The moisture carries contaminants which cause oysters. The more contact your plate holder has with the plate the more likely you will have oysters. Dry-plate holders make contact all the way around the plate and on the back. Consequently you need to spend quite a bit of time making sure your plate and plate holder are clean.
One last point; by using a dry-plate holder in your GG back, you do take the risk that your holder will leak, leaving silver stains on your beautiful camera. The stains on my studio floor attest to this danger.
All this said, I use a 8x10 dry-plate holder for wet-plate all the time. I take the extra time to clean the holder and the rear of the plate before loading.