I have a cunning plan brewing involving escaping the worst of the winter and buggering off to Spain/Portugal on a bike.

Wonder if anyone could help:

Does anyone have experience of:

Couchsurfing?

Wild Camping in Spain/Portugal?

Spanish mountains in winter?

Gnarly MTB with a bike trailer?

Working with charities on such a project?

Any other info, like cool hostels, cool people who I should meet, nice swimming spots, hot chicas, good tapas, and of course fine cerveza also appreciated.