As posted above, this is the Moss-Bow superintendent website for dog shows that they run. There are other dog show superintendents -- I haven't shown down south in a few years, but I think maybe Jim Rau is more popular? At any rate, if you google Dog Show Superintendents you should find several of them and be able to track dog shows in your area.
I would be extra careful of goldens and labs, temperament wise -- the fact that they are generally good family dogs has led a lot of fly by night breeders to produce them WITHOUT regard to temperament, and there's nothing sadder than a nasty lab or golden, and there are more and more nasty ones showing up every day. A good breeder will not tolerate anything but great temperaments in their dogs. In some breeds, a tougher dog is to be expected, and sometimes a "good" temperament of that breed might be more than a young family wants to live with, but for a dog like a golden or lab, the standards should be impeccable for family living.
My current dog, a rescue lab, is a bit dominant. He needs a very young dog so that he can continue to be the top dog with no question.
You can't really control for dominance except by picking a submissive puppy (all the more reason to work with a good breeder to select a pup that appears to be destined to not be particularly dominant). Your best bet is a dog of the opposite sex, though even that isn't fool proof. But simply being older is no guarantee that the older dog will be dominant -- upon sexual maturity if the younger dog decides to take over, the older dog will submit or there will be problems as they work it out. But it's something they need to work out and you need to respect the conclusion they come to. A lot of people run into problems when they try to support the older dog as dominant (feed it first, etc) despite the fact that the younger dog has taken over. That sort of thing makes the younger dog think that he needs to keep proving who's REALLY the boss, so it's best to just watch and let them work it out (unless somebody's getting hurt).
That's more of an issue with working dogs than field dogs, but it depends on what you mean by your older dog being "a bit dominant." Dogs who are really dominant don't really get into too many scraps -- they're above it, and other dogs accept their superiority without their having to assert it. Insecure dogs and dogs trying to move up the totem pole tend to provoke incidents and sometimes get labeled as dominant when they really are not.
til he passed away.
