Is there any cheaper way into Rotterdam nowaday's perhaps via the flying club?
At EHRD handling is cheapest from Aviapartner, but stil 90 euros or so for a light single. That does not include the landing/ATC fee,
AFAIK.
Handling is mandatory and the Vliegclub Rotterdam (of which I'm a member) nor the RAC are officially allowed to offer you handling services - you need to go to the KLM JetCenter or Aviapartner. Exceptions to mandatory handling are only made for people who are either member of the Vliegclub or have an appointment with the Vliegclub.
If you have a WiFi laptop you can use the normal sources for WX, NOTAMS and Flight Plans. (Note that FPLs are mandatory when you cross a FIR boundary!)
Here's what I typically use, but do note that I'm a Netherlands resident and I might be entitled to services that you are not entitled to:
Netherlands Aviation weather (public site, in Dutch but you should be able to find the Low Level Forecast, METAR and TAF keywords in the right hand column):
KNMI Luchtvaartmeteorologie. You can also call the KNMI and get a meteorologist on the phone to provide additional information to the TAFs and METARs. Phone numbers for VFR and IFR are in the AIP, but note that they're not exactly cheap.
Loads of weather information from lots of sources:
Wetter : Wetterzentrale : Top Karten and an interactive loop on
21st Operational Weather Squadron
NOTAMs, AIP information: From the Eurocontrol site:
https://www.ead.eurocontrol.int/
NOTAMs can also be found on the
http://www.homebriefing.nl site (registration required)
Flight plans: Can be entered on the
http://www.homebriefing.nl site. Or phone them in. The FIO telephone numbers are in the AIP or Jeppesen.