What's so tough about rainy season plein air?

The beginning of a unique outdoor sketching season in the Pacific NW.
Advantages:

1. Comfy seat, with optional warmer. 
2. Climate control.
3. Watercolors and inks stay dry. 
4. Cup holders for your painting water AND your latte. 
5. Built in steering wheel/easel.

Car sketching

Disadvantages:

1. Viewpoint must have parking. 
2. Risk of being taken for a stalker in unfamiliar neighborhood. 
3. Drips and spills have consequences.
4. Your umbrella may atrophy from disuse.