Ok,
Here is an update for TT riders,
the car park is deep with snow and
NOT good to ride on, if you ride on you risk sinking as the snow is deep,
my advice is to park on the road and carry your gear,
Tent pegs bring long pegs as the snow is not hard and nearly 2 feet deep in places and deeper in others, forget screws , the road up has an inch or more on top of ice and is very slippery, that said a goldwing with Immler tyres got up and a two wheel drive ural struggled