In reply to joedonn:
Beacon...
Or a more sensible answer is following the weather.
I tend to look at Met Office or whatever and check:
Llanberis
Llandudno
Tremadog
Holyhead
Llangollen
That'll give me an idea of where's best.
Slate is the classic drys quick option.
Hope you have better weather than we're currently "enjoying"!
Post edited at 14:41