I work at the dispatch of Amsterdam and region, and the fire house of amstelveen should never be a problem to visit. They've got alot of vehicles, with divers, ladder, rescue unit and two pumpers..(new command unit and foam tender are not to be found there unfortunately)..
Firehouse here is 24/7 occupied..
In the hague and region you can also visit some houses like the one above, or Delft, with alot of vehicles, a new pilot with a pumper with four people..
Delft is between rotterdam and the hague..
In the hague is also a motorcycle to be found, fire house Den Haag Centrum..
In Wassenaar, where I also work, you are always welcome during the day, when the firehouse is occupied.. we have 2 pumpers, from which one is brand new, 4x4 for forest and dune firefighting..
Wassenaar is placed next to the hague..
Oh, by the way, driving from Amsterdam airport tot Rotterdam doesn't take a whole day, just 1 hour...
At last but not least, maybe pay a visit to our dispatch in Amsterdam, which is housed in one of the busiest firehouses in Amsterdam, called Nico..