Hi - I live in the Outer Hebrides of Scotland and it's very 'damp' much of the time.
I paint finished work in my studio from watercolours done in a hardcover sketchbook on location (usually wild, mountainous areas far from habitation) but I have a problem with watercolour sketches which simply refuse to dry outdoors. I've tried a disposable lighter (ok but I burnt my fingers eventually!).
I searched for rechargeable hairdryer but it seems there is no such thing (probably because of the power requirements). I also thought about getting a pocket blowtorch (there's one made by Soto which looks quite good) but at 2300f I think it would set my sketchbook on fire!
My final idea is a small lightweight meths (alcohol) camping stove (and I can always make tea afterwards
I usually work back into the wash once dried with a Copic multiliner (BS) Working into a wet wash messes the pens up double quick, which is why I need to dry the wash outside.
Any ideas or suggestions would be much appreciated!