When going on an oyster safari,it is highly recommended to go with a nature guide like Sten Munk Svendsen, who is very well acquainted with the area. Otherwise you can easily win lost or win stuck in the mud, or thereby getting caught in the high tide.
For more information please see the links below:
Vadehavscentret in Danish
Wadden Sea middle in English
Guided Oyster Tours
Source: denmark.dk