Yeah, back when I was starting out, it was nice to visit all the "big time" breeders' yards. Nowadays, though, it is just not very good judgment. Not in the US anyway.
Last time I let folks over to the yard was back when I was in TN. And even then, the only people I let in were either 1) longtime customers of mine who I knew were cool, or 2) dogmen who were both well-established veterans and had plenty of their own deep money. People with no money are the first types to try to steal and/or drop a dime on you. The last kind of person I would let in would be some fast-talkin', "just-got-in," snaggle-toothed, bogue to the yard.
Jack