We've stayed at International Camping Lido just outside Lucerne a few years ago and it was very good. We used it as a stopover for a couple of nights on the way to Italy. As the name implies it's right beside a swimming Lido and it's easy to get into the centre if you want to. (We also stayed at International Camping, Como - it was a bit rough then and clearly has gone even further downhill!Pity, as it's handy for the motorway and Como town is well worth a look, particularly the lake front.)