I like Sealskinz socks as camp socks. Means you can put your wet shoes back on without getting wet feet.

For socks, I use X socks trekking socks.
Used on 3 challenges.
Utterly brilliant and very quick to dry.
I use innov 8 Roclites.

Have used Sealskins, but found they are just not waterproof and don't dry when wet.
I use Gortex bike socks over the x socks when it is really wet, and they work well for me

Sealskin socks may be ok for camp socks.

In the tent I use Goosefeet down socks.
They are a bloody marvellous indulgence.

The other thing that helps when it is wet, is to rub Gehwol foot cream into feet at start and end of the day.

I have had Sealskinz fail on previous Challenges, but they do continue to provide insulation and wind resistance in snow and on cold, windy days. something that could be VERY useful for the conditions likely to be encountered on this year's Challenge!

They also keep out all the grit and gunk that Alan refered to in his post. They keep your feet clean even when wet.

I'd prefer to wear Merino socks any time, but I think Sealskinz and similar do have their place when wearing non-membrane trail shoes.

I'm with Andrew on the Gehwol foot creams: Extra before setting off in the morning and Refreshing Balm after cleaning feet at night; Exellent stuff!

I'm with Andrew Walker. X socks are superb. I get the Trek Lite model. Available on the net from ultralight outdoor gear.

Not enough Merino in them for my liking!!!

Thanks everyone for all the tips!