In reply to Number18:
Just for info, Pen y Pass was full at 8.30am this weekend. Given Yr Wyddfa/Snowdon is a 'crazy popular tick', I wouldn't be surprised if you were unlucky about parking at 5.30am at Easter. As others have said above, there are other ways to sort out parking on busy weekends, including various paid parking field towards and around Nant Peris.
I'd add the mountain behaviour this last weekend was apparently a 'shit show'. The ascent really needed spikes to be safe given extensive ice on the upper sections of paths, and yet the paths had the usual collective of ordinary training shoe brigade with clothing more suitable for valley walks. Llanberis MRT are pretty much at their limit right now, and given this 'summit baggers' should be much more responsible in anything but good weather.
If in doubt about what kit you might need, follow MRT advice and use #Adventure Smart.
https://www.mountain.rescue.org.uk/safety/adventure-smart/
https://www.adventuresmart.uk/be-adventure-smart-in-winter/
Post edited at 11:23