Thanks for a few of the links in the replies, hadn't come across those before
Kinky.nl has been pretty good for me, typically Escort translated from dutch usually means outcall or outcall agency in my experience. Private Reception is what they usually call an incall at their house/apartment. And a PriveHuis (Private House) is like a traditional brothel setup. Punters is usually 'Walkers' in dutch too, if you see that mentioned of the dutch forums.
Never been to Dordrecht but been meaning to so will be interested in what you experience there.
RLD in Den Haag has a lot of fans but I've never found it impressive in my visits and never took a punt either but what others mentioned above is accurate.
External Link/Members Only - This is brothel in Rotterdam that has been on my list for awhile but never visited. It has a lot of good reviews on the dutch forums though, although the quality of women may not be the strongest it might be worth adding to your itinerary.
I have been to this brothel in Leiden
External Link/Members Only which is only a short train ride from Den Haag, and had some decent punts there.
Standard of girls is much better in Antwerp RLD than Den Haag RLD from a dozen visits to both, so would recommend a trip there if you can work it in. Have fun, play safe and look forward to your stories!