In reply to Removed UserGRUMPY MONKEY:
We did the northern half from Vizzavona in 2011 with three teenagers and stayed in the refuges. I had booked every night on the Parc Corse website, but got no email confirmation that the booking had gone through. I rang the Parc office a couple of times and (if memory serves) got verbal confirmation that we had a booking, but still no email or otherwise written confirmation of it.
So we get to the first one, at Onda, quite late. No, they have no record of our booking. The teens, by this stage, are practically crying or insurrecting because it's a hard first day to there from Vizzavona. I protest in French, carry the day and we all get to sleep on the kitchen floor, except for me, who has the hump by this point and opts to sleep on a table outside 'so I can see the stars'.
And so it repeated at several of the remaining refuges. But in every case, they relented and let us stay. Our booking must have gone through though because in at least one, our names were on a list. That was the second, Petra Piana, where we arrived soaking after a couple of hours of rain. The place was rammed, standing room only in the steamy kitchen, washing lines all over the place and only one empty bunk space left. I politely pointed out, in English, French and then German that at least a few people must be lying in spaces they hadn't booked. No response. I go over to the next building to find the warden. He's asleep. But, when he wakes up, he is magnificent and turfs out the interlopers. Our names, amazingly to me by this point, are on his list and in we march, with barely a thought for the ejected.
The food at the refuges is very expensive. There are always kitchens where you can cook.
I loved it. Enjoy!