Offsite in Holland and Germany
My experience
-> I have to fly to Germany from Belgium. I also did some type ratings in Germany : offsite is a no go. The procedure communicated by FL is correct, but in practise one has to contact so many districts that is is hardly practical. Even for CPL's this is considered "an exception", so cannot be planned 14 days in advance because then he probably could and should organise for an alternative transportation (call a cab)...
-> Holland : Again the said procedure by Nomads is correct, so possible, but the 24hrs only will only work if the township has some experience with it (for instance Hotels etc that have some landing experience, so that the secretary of the maire/counsel is knowledgeable and efficient). Otherwise I apply the rule : if it costs more time to get the permit than to drive to the next airport, why bother....
m2c