Kurt,
Yes, a very common occurrence at least at my desk! The WNW Camels are beautifully engineered however I personally would prefer the cabanes not be molded to the fuselage. I have built 2 Wingnuts Camels to date and struggled with broken off cabanes on both, it's just far too easy to have an accident (or three!) with them!
I use pinning as the solution. Drill both ends of the broken strut and use guitar steel strings or Nickel Silver rod from Albion Alloys, 0.45 mm diameter would be the minimum I would recommend and personally I prefer the guitar string as it's available in bigger thickness. I use CA to assemble them and attach with CA as well. Obviously alignment is critical. It's a delicate operation. Hope this is of assistance.
Cheers,
Lance