When we bought our 2nd Triton from Wisselink Caravans in Lichtenvoorde near Arnhem, we then spent a couple of days at Camping de Cauberg at Valkenburg - not far from Maastricht. It was lovely - very hilly, but beautifully terraced. Again, no other Brits (which we rather like). I don't think Holland really features in British minds as a holiday destination - other than Amsterdam and, perhaps, Delft - but it's great for cycling (apart from Valkenburg!)