I have a labby/beagle mix (and he is a crazy, little nutter), a golden, and a briard.
Good luck with your trialing.
Haven't seen any around the agility ring here.
My girl started in obedience, but she is such a live wire . . . our trainer said, "You know, I think she'd be happier in agility." And she was.
I don't think I'm going to take her on to MACh, just retire her with her Excellent A title . . . so then we may go back to obedience now that she's 4 years old and a LOT calmer.