The Concessionaire model you have for camping in NPs sucks in the states. We got turned away from some sites because they were "full" with obviously empty sites of an evening when what it actually was was sites booked (and paid for I guess) months in advance by European tour companies who rent out motorhomes. They'd block book campsites so their clients didn't have to think, instead paying in their tour the extra cost of all those empty sites. Then there were the sites where we had to pay for a full site, power, the lot, when nothing else was around... Could the concessionaire possibly accommodate two cyclists in a tiny tent? Nope... doesn't fit with the system and doesn't maximise their revenue.