No, not really. It was pretty easy to find them and then a ton of them start spawning in the khergit valleys. I find it a little too difficult to persuade them to teach you, though. I had a character with 10 persuasion still fail their checks. Be easier if I had the option to buy their teachings instead with meat, furs, stuff that they would use.
Tons of them spawn though, so it kinda balances out. I'd like it if those persuasion checks were a little easier though. You did good work here.