I think it's a case of horses for courses, sense must prevail!!! I've done outside concerts, esp. on grass, where the sound just gets swallowed up.. it all depends on the piece, the venue, and the distance from spectators! If it the muted cornet can't be heard over on the trombone stand.. what is the point of them playing? (like we were listening?!? ) For the Holland trip Fran, I would have thought it would be worth taking them.. cobbled streets and market squares tend to bounce the sound around a bit.. so the audiences will hear everything.. at least once! lol, so it might as well have all the desired texture and tone-quality intended! again, sense must prevail.. if the mutes as a whole are a pain in the bumm to commute.. and only required for 2 pieces.. then stuff it, get em to shove their hands up em! - Enjoy the trip anyway!