I'm not sure if this info is under the heading of towing in Holland, because it applies to any driving in Holland.
You may, or may not be aware of this, but it will confuse you if you are not prepared. The roundabouts work the opposite way round (generally) in this pleasant country. I don't just mean that you go in a anti-clockwise direction, the rules of right of way are changed too. In Holland you can drive straight onto the roundabout without giving way to traffic already on the roundabout. This means that you have to give way to traffic coming onto the roundabout as you travel round.
To add to the confusion, there are certain roundabouts that use the UK way of doing things, usually near ports but not exclusively so. Until you are used to the way they drive over there, pay particular attention to road markings and signage, which will help. Apart from that you will find the dutch drivers just as good if not better than British road users.
Do you know about the rule of thumb on giving way on unmarked roads, Eileen?