OK,
Well, after last night, I have a little bit more insider information about the Chieftains and their willingness to let locals come play the encore with them. I have this information as I was honored with the chance to deliver a chanter to Paddy Moloney himself last night which was acclimated to play in Utah’s high and somewhat dry climate. My Heidi and I got to spend about a half an hour with Paddy in his hotel room chatting about all sorts of things from pipes to concerts to travel plans and tune names.
First off, the band as a group loves it when locals come to join them. They feel it’s a sort of local connection to the city in which they’re playing. It’s the tour managers/stage managers you have to be on the watch for. Much of the time, the band isn’t aware of what’s going on with them in the city (things like radio broadcasts etc.) they’re just told where they need to be and when, and when to show up for sound check.
If you’re going to try and play with the boys it’s suggested that you show up (on time) for their sound check before the concert. Usually this is about an hour and a half to two hours before curtain. You may wish to call ahead to the venue and ask to speak to the stage manager so that he/she is aware of the intentions of the band and the local musicians.
Be courteous to whomever you meet at the back doors as it isn’t usual for this sort of thing to happen. As far as they are concerned, you may as well be some crazed stalker fans who want to maul the artists as soon as they pull up to play that evening and they’d rather you weren’t just ‘hanging around’ their back stage doors.
That being said, it isn’t difficult to convince them otherwise if you happen to pull out a whistle and play a quick set of reels to show them you mean business. 
Sometimes as well, the band will publish something in the local paper(s) asking for locals to join them and will give details about the best way to do so. Keep your eyes on those for several days before the show.
What can I say about Paddy? It took us all of about 30 seconds before we found ourselves laughing and joking together like we’d known each other for 30 years. A genuinely NICE man. And he’s short. Really short. With a funny nose. But what a gentleman. He is extremely pleasant and it was hard to end our conversation although I had a dinner date and he needed to go over some tunes with their new harpist.
He went so far as to offer Heidi and I tickets to the show (which we could in no other way afford) specifically so that we could join him for the encore. We tried to be polite and told him over and over again it wasn’t necessary, but he was quite insistent about it all. What an amazing guy! Dale, so you know I tactfully dropped the C&F name several times which Paddy said he remembered from his interview with you a while back. Pretty cool stuff really!
I’ve got some photo’s I’ll post in a few days.
Bri~