It's probably not what you're looking for Chris, but the Highland Wildlife Park is a good backstop for something to do and their website will give things like feeding times. The polar bears are pretty much unique and they come right up to the fence to be fed, so you can certainly get close enough! One good thing on their website is the webcam for the snow monkeys as you can get a good idea of the local weather from watching it.
http://www.highlandwildlifepark.org.uk/