I totally agree!! A camp for stutterers is a great way to expose him to other PWS and he can learn techniques to cope with life's stressful events. There are many organizations (I don't know where you live) to help like CampSay (USA), NSA (National Stuttering Association- USA), Stamily (UK), and there's another one in London but I don't quite remember the name. Also search on YouTube for other children who stutter so that he can see that he's not alone and he can learn techniques from that medium as well. I do have to Thank You for being a wonderful parent in support of reaching out for assistance because that's not the norm.