Quentin SF
Changing track (well, species) just a little on the towels question - we now carry one of the new breed (sorry) of dog towels, called an EasiDri. You keep it rolled up in its plastic tube as it works best when already damp. ...
Would presumably work well on humans too but haven't tried that yet.
We are absolutely dependent on these - we use the 'Aquasorb' brand, and we have four in the van. They're sold for dogs, but we have one for the dog, one for me, one for my wife and one which is used for condensation and for drying off the thermal topper and silver screens if it's been rainy.
They're a good way of moving water around, and in particular, of making sure that, wherever it comes from, most of it stays outside the van rather than inside. Big fluffy towels are nice, and even microfibre ones, but these solve so many of the what-to-do-with-wet-things problems for us that we wouldn't be without them in a small van.