I am going on vacation to Vancouver Island in March for the Pacific Rim Whale Festival. I plan on do lots of hiking and wildlife/landscape photography. I currently have an E-PL5, with the the kit 14-42 and 40-150 lenses. Here are my questions. Should I get a good prime lens (I was looking at that Panasonic 20mm) or should I get a lens with better zoom (like the Panasonic 100-300)? I was thinking if I took a boat tour to go whale watching, I might not be able to get clear shots of whale with a 300mm lens. I thought the camera shake might be too much with the boat moving and all. I really like wildlife photography, but I think the 300mm might be a waste of money since I already have the 40-150. Or should I get the prime lens and get better landscape/low light photos? Any ideas/suggestions?