I believe from being told by a member of staff the small porta-cabs are staying put for the winter times and people will enter the zoo like they have done all the last winter, with no hitches.
The 1952 gates do open and close.
The current system is designed for when the zoo is busy, and expecting upwards of 5000 plus visitors, which it will do from the likes of March to October.
I suppose on some rainy days the staff, like the keepers and the visitors will have to be responsible enough to wear waterproofs and an extra jumper, not that i've heard any moaning about it anyway.
Well every time I go, they moan like hell about the cold and wet!
I know they will be responsible enough to wear whatever, but how easy it would have been to have it undercover!