@Rush_Lion:
I would recommend travelling by plane, but this also depends on the costs you will have to pay for a flight from the Netherlands to Eastern Germany. For me, travelling by plane is much cheaper than driving by car (from Cologne to Berlin ~ 600km), because the costs for fuel (for ~1200km) plus the costs for parking would easily reach an amount of around 150 to 200€ (or even more when parking at the Estrel for 18€/6 nights). So I looked for flights and found very nice offerings, therefore I booked my flights with "Air Berlin"-airline for around 97€ (price for
both flights together!). Also the flying times are very nice and relaxing, so I won't have any stress and instead of an 6-7 hour-drive, I'll arrive in Berlin very early and rested.^^
So for me personally it's kinda perfect, because I save
a lot of money and won't have an annoyingly long car trip.
But I don't know how much flights from the Netherlands to Berlin will cost, you will probably not have the possibility to fly with a rather cheap airline like "Air Berlin", so you have to look that up and then calculate what will be more expensive for you, either travelling by plane, or travelling by car, train, ...
A car drive from the Netherlands to Berlin might of course take a very long time, so some people also pay much more money to have a way faster trip by plane. So even when it would be more expensive to travel by plane, I would definitely recommend it.
But that's of course your decision.
AND...very important...you can't bring very much stuff to EF when going by plane, so when you plan to have a lot of luggage and stuff for EF, you might have to drive to EF by car, but when you have bad luck, you'll have to pay a lot for parking. :3