Racor is metal and they also sell a heating element for it. Or, you could route the drain hose into a smaller can down below so the catch can stays unobstructed. If your catch can froze and became obstructed then you could push your rear main seal out (reports of this on the other forum) the provent for sure has a bypass if it became blocked, the racor tells you if it’s blocked but I’m not 100% sure it auto bypassesI have a catch can on my Power Wagon and collect a LOT of oil and unburned fuel as well as water.
The problem I have with that truck is the catch can contents freeze solid all winter.
Not too wild about trying a plastic catch can that may split in the cold due to freezing.