In answer to the thread, a couple of rule you must know, most water can be fished on the yearly permit, but my best advise is ask to fish one of the local club waters around the area that you intend to fish. Or their are a few commercial ventures popping up. Contact the local tackle shop, they are normally very freindly and most speak very good english. I was their last week on business and travel every couple of weeks over their.
Simple rules are no bivvies with sewn in ground sheets, this is classed as camping and not alloud, no fishing for catfish they are protected in Holland so a def no no.
To say the fish are smaller, this is deffinately not true I witness two fish last week banked one of 29.2 kilos and the other of 31 kilos both commons and banked at mid day. This way a small gravel pit just outside rotterdam. Further up the road was a what I would describe as a beck about 5 myrs wide and interlocked with several other becks the sight was unbalievable about 50 - 60 fish all holding round a feed pipe from the feilds. 30 - 40 grasses about four to four and a half feet long 30lb+, massive, and some realy big mirrors def over the 50lb mark, one was that fat when it swam it wobbled from side to side.
Speaking to one of the shops in the town of deventure they have waters where fish over 60 are common, pictures everywhere to prove it. All the shops are the same.
With France now getting more and more costly I def think for a cheap carping holliday, Holland is a must check out location. I would be interested in starting hollidays their if anyone else is interested.