I walked the
Camino Frances, from Roncesvalles, in 2004, carrying my CPAP. Yes, it was very heavy. Yes, I wished I could do without it, but No, I can't. No, it is not noisy; no more than the fan on a desktop computer. Yes, it is MUCH quieter than the snoring! (And Yes, I can honestly say that I NEVER added to the symphony of snores - you can't snore when you are using a CPAP!). Yes, a few albergues I had to walk past, because they had no electricity,(or no power-points), but not many (three, I think). I carried a 10-metre extension lead, which I had to use 3 or 4 times. And most importantly, I carried a letter, in Spanish, explaining my need for a power-point. I was glad to be able to use that, several times.
A few years ago, I posted an entry on the Confraternity of St James webite, under Infrequently Asked Questions (see
http://www.csj.org.uk/i-faqs.htm#electricity). This includes the text of the letter I carried.
"I suffer from Sleep Apnoea and have to travel with a CPAP machine"
The basic answer is that yes the refugios do have power (220 volts), but whether there would be an outlet near your bunk (or even in the dormitory) is another matter. Some might. I suspect that many wouldn't. I base this on seeing mobile phones left on charge in various parts of the refuges, but not necessarily adjacent to their owners' bunks (the obvious place if you want to keep an eye on them). On the whole, the refugios offer simple basic accommodation, and I doubt if many of them have installed a more comprehensive electricity supply than they have to. I know of one which only has sufficient power for lighting, not for anything that draws a higher amperage
In addition, there is a certain competition for bunks: near the washrooms for those who need to get up in the night; on the lower level, for those who don't like climbing up; near the door for those who want to leave early. Needing a bunk near an electrical socket could - for example - put you in conflict with somebody who just must have that bunk because ... I mustn't over-emphasise this, but you'd better be warned.
The dormitories tend to be noisy at the best of times, with the ubiquitous snorers, and the squeaky springs. Again, I don't know how much noise your machine makes, but do remember that you'll be sharing often cramped quarters with a great many other people.
One solution often adopted by people who can't stand the snoring is to sleep outside the dormitory (eg on one of those thin rubber mats which don't soften the floor, but do keep the cold away). You soon get used (especially after a day's walking) to sleeping on the floor, and if you were prepared to do this when necessary - eg to be beside a socket, and away from anyone else you might disturb - it might be a solution.
There are small hotels all along, and while they're more expensive than the refugios, they do offer a possible alternative, and of course are much more likely to meet your needs.
(I see you ask about gites as well. Much the same applies, except there's not quite the same pressure on the beds. It depends on the time of year of course.)
A year or two after posting the above, we got the following message - many thanks, John !
"Greetings, from New Zealand!
My wife and I have just returned from four months in Europe, which included walking the Camino, from mid-Sept to early Nov, 2004. I have severe Sleep Apnoea, which requires me to use a CPAP (Constant Positive Air Pressure) machine, in order to get any sleep. I carried my machine throughout Europe, including on the Camino from Roncesvalles to Santiago.
Apart from the weight, I had no problems. A few Refugios we had to simply walk past (eg San Anton), because they had no electricity; but the vast majority have a power point somewhere, (mainly, so that people can charge their mobile phones!) As you pointed out in your reply to a question about this, you usually can't choose which bed you get to sleep in, and the power point(s) available may not be near you. I carried, in addition to the CPAP machine, a 10-metre extension lead, which I HAD to use three times, and which was useful several other times.
I also carried a letter, which my daughter had translated into Spanish, addressed to the hospitalero, explaining my need to use the CPAP machine, and that this used very little power (a concern for some hospitaleros). The other concern you mentioned, of noise disturbing other pilgrims, certainly isn't a problem with the Resmed machine I have; I think all CPAP machines nowadays are pretty quiet. Certainly, less than even a quiet snorer! I asked many people if they heard my machine; none said they had.
The only other problems, of course, are for the person carrying the machine. It adds several kg to your pack, especially with the extension cord; and you MUST keep it dry, no matter how wet everything else in your pack gets. We had continuous rain, all through Galicia, and I simply wrapped my CPAP machine in three sound plastic bags.
So - Yes, it can be done. Of course, try to do without it, if you possibly can; but if, like me, you can't, then don't let that stop you making your Camino! And it does have a couple of advantages. Because you sleep so much more soundly, you don't have to get up during the night for toilet visits. AND, you can ABSOLUTELY guarantee that you do NOT contribute any snoring to keep people awake - it is impossble to snore, when you are wearing a CPAP mask!
Here's the text of the letter I carried:
Senor <my name> sufre de Apnea y requiere la ayuda de un aparato
respiratorio para dormir. Esto significa que <Sr. xxx> necesita acceso a
una toma electrica durante la noche. La cantidad de electricidad usada es
minima, pero es esencial para su confort y salud. El enchufe debe estar en
un radio de 12 metros de donde duerme el <Sr. xxx>. Muchas gracias por su
ayuda.
Buen Camino!"