It took us a few days to completely dry out everything that got drenched on the first day last year
Have you got a little front vestibule thing to your tent Euan? We rigged up a complicated clothes line going to and fro and managed to hang a whole heap of stuff. I also had a little stool with a back, and we hung all our socks/gloves etc. on that overnight to get dry. We bought big ziplock bags from the supermarket and kept the wet things in those from day to day and gradually got them drier!
If you do get very wet riding, as soon as you get into town try to grab a newspaper from somewhere for your shoes. Portland was completely devoid of newspapers by the time we tried, but some lovely shopgirl found us a stash of last month's local paper to dry out our stuff.
Still a cyclist, albeit one who never rides any more....