I am writing an article on the effects of whitewater parks on stream fish for publication in a fisheries journal and need a nice map of whitewater park locations in the US. I'll supply the list of cities/rivers. My GIS skills stink, so I'm hoping someone out there might be interested in helping me out on this. I will pay, but have a tight budget as its out of the pocket of a poor grad student. Alternatively, I'm an experienced instructor and I can offer rolling or on-river kayaking lessons (for you, your girlfriend, your mom, whatever) as a trade.