I have been there two weaks ago,
At the locks in Antwerp you can park your car and shipspotting
In the morning hours you can stay at Riland close to Antwerp or go to Terneuzen,
Walsoorden is the best place you can also stay in your car but go to walsoorden around 14.00 until it get dark with the sun you can fantastic pics
If you want a special ship just watch the pilot list at
www.loodswezen.be.
There you can decide if you want to Antwerp or Terneuzen both places you can shipspot from your car
For Antwerp contact Stevo
www.stevo.be .
He knows the best places around Antwerp.
Regards,
dave