I agree, all pilgrims should be prepared to deal with the problem. But don't rely on the information on this forum - there are lots of reliable scientific reports written for the layman on how to avoid them, or deal with them once you are exposed. Do an internet search and look for extension publications from research institutions or universities. (aside - we have had good luck sealing our packs in large heavy-duty zip-lok bags while in albergues. We also pack our sleeping gear in smaller zip-lok bags to isolate it from the rest of our gear).Any bedbug news this season? BE PREPARED
It is a little Boy-Scoutish, but "Be Prepared." Even after a lodging has been sprayed for bedbugs, the very next pilgrim can bring in more. If the entire route is sprayed, the very next pilgrim can bring bedbugs from another country. When one albergue has bedbugs, every albergue down the route is likely to have them. If you know there are bedbugs, then your objectives are: 1) don't get bit; and 2) don't spread them. If you spray your sleeping bag with permethrin, bedbugs will stay away. If you spray your backpack with permethrin, bedbugs won't hitchhike in your equipment. If you are allergic to permethrin (or are too green to want to use chemicals), you simply will fail to achieve either objective, and you and fellow pilgrims will just have to live with it, and perhaps with many bedbug bites.