Hi Bekar!
I think you'll get the most response if you go here:
I'm looking for some fellow dutch spinners...yes, it's the 114 page Dutch Spinning thread... just skip the first 113 pages and post on the last one

Unfortunately I'll be in england & spain myself until the 4th, but I'm sure some people will want to meet up. There may be people going to the Vikingmarkt, but if not, you could also suggest a meet in Utrecht, which is 50 minutes by train from Eindhoven. Because it's in the middle of the country, that's where most people show up for meets.
You could also contact
Punkskullas he lives quite close to Eindhoven: he will probably know which spinners are in the area.
Have fun in Holland!