If you are not currently using The Noun Project for some of your icon needs, stop what you are doing right now and go there. More than 700 diverse, high-quality icons await you in SVG format (don't worry, Illustrator can handle it). According to the site's Mission page, "The Noun Project collects, organizes and adds to the highly recognizable symbols that form the world's visual language, so we may share them in a fun and meaningful way."
Fun is right. Go check out some of the hilarious icons. Wood gathering is rendered quite well. If only I were working on an interface that needed that depicted in some way.
Extra bonus: No less than five depictions of skiing. How awesome is that?