I responded and filled out those dates I have yet no commitments. However, that may change over time.
I would urge all those who responded positively not to let it run till late(r) and make advance travel plans now - and if from overseas (I know I did this too frequently and those that know me more intimately know what I am talking about - and thanks for all the good times -!!!) -. This also goes for my esteemed other Dutch Zoochat zoofriends though ... (allthough I do not mind a 2-man party, but hey ... the more folks in the group they merrier!).
For @Welsh Photographer travel advice: I am surprised that ... there is not much wheel chair / fair price access around our capital city. However, I would suggest you look around Arnhem and Utrecht as Timmiegun suggested (which have a far better price range and closer to Burgers' Zoo and other zoo facilities in the area (DP Amersfoort, Apenheul ..). If you would be looking to visit Amsterdam or Rotterdam zoos this can be easily accomplished from Utrecht (more central like)/ Arnhem and travel times are never more than an hour plus (with public transport / trains).