This is just a wild guess, but maybe the exterior storage at CBR is meant for just standard storage, and during a Hurricane situation they will take them to a warehouse or something?Since the CBR station is where they have the cabin storage facility, wouldn't they also have the stubs there to move the cabins off the line and into storage there? I'm thinking that they'd add/remove cabins there?
And why have two stubs, one on each side?
Your idea is still the one that makes the most sense, Do all systems have a stub rail for each line? I don't remember seeing them on any of the lifts I've ridden. (Doesn't mean they weren't there, just that I don't remember seeing them!)
In that situation, they may want to remove them as quickly as possible, hence the need for a dual stub rail setup?