I don't think it's peculiar to Campy; some tire-tube combos are just rough like that. Try a bit of soap on the bead and rim, and make sure that tube is out of the way of your tire iron. I've heard good things about purpose-made tools for this job, like this one:
http://www.jensonusa.com/store/produ...th+Handle.aspx
I haven't used one, but you might consider. An hour is a terrible thing to waste.