Dougal said:
Yes it is. No cheap Eurostars out on Friday and even more expensive back on the Sunday.
Not cheap - but worth it!
Hotels in Germany are the biggest problem, we are paying 153 Euros for a double room, they only had one night available, so we have opted to stay with some relatives in Brussels on the Friday night. I couldnt find anything anywhere near Gelsenkirchen for Friday and Saturday night!