Hi,
on that weekend there is a run what you brung in Bitburg. It is not to far away from NL and maybe a chance to test and tune.
We are making a small, non-official Mopar Meeting there on the 23./24 June. So a bunch of german Mopar guys will be there. You are more than welcome. If you want more information about the official event, distances etc check out:
http://www.1on1-motorsports.de/mambo45/
Groeten
Carsten