I have never camped in Europe before, but it is my understanding that most campsites (not sure about all of them) are usually a little bit out of the main city. If you will be camping a lot, then it would be worthwhile bringing a tent, sleeping pad, and a lot of the cooking/eating supplies necessary for camping. If you're only going to be camping once or twice, it probably will not be worth the money saved to be lugging that kind of stuff around for your entire trip. If you do a google search for europe campsites, you will find a bunch of links (http://www.campingcompass.com/
seems to have a lot of information). Hope this helps.