In reply to roypartington:
I did several of the 3000s yesterday as a reccie. You will have seen my post asking about the best way to do them as a loop.
The ground is very very wet. My feet got soaked early on and never dried out.
The only dry bits I found were:
Snowdon from the Clogwyn Station to the summit and back down via Crib Goch
The section from the top of Glyder Fawr via Tryfan most of the way down to Ogwen
The ridge from the summit of Pen Yr Ole Wen to Carnedd Dafydd.
I wore Guide Tennies and would wear them again. They're light enough to run in and excellent on scrambling section like Crib Goch and they have good protection for the toes.
Good luck, and let us know how it goes on the day.