I'm looking forward to winter painting camp, sponsored by the Grand Marais Art Colony. I did it last year and it was a fine treat, and I came home with some nice paintings. It takes a different kind of planning and packing to paint in pastels outside on a frozen lake in northern Minnesota! Some of the things I've learned: snow-pants are a good thing; use chemical hand-warmers, in mittens and in boots; get fingerless mittens that let you expose your thumb, to get good control of the pastel; pastel sticks are VERY cold to hold, keep that hand warmer, er, handy.
The good news is that there are no bugs when it's 10 degrees!