To answer the first question, no there isn't any agency in Kamloops (aside from the AMPs that 'sometimes' goes above and beyond).
Indy providers that have been established to be legit, quality and mileage varies (from the first page off Leolist):
Ruby 5372 - Asian girl, real pics. Good looking 'auntie', gets it done.
Brooke Waters 4191 - BBW, kinda of mental about booking procedures that I've read here. But good once you get through.
Tiffany 1700 - Real, but I've gathered she's a high-maintenance kind of girl. Judgey. If you're not Mr.GQ, then YMMV.
Ember Reign 6619 - Never met her myself, I want to. But only does Incalls sparingly, never could get my schedule to match her Incall times. I keep missing out. But I know she's real, and reviews are favorable.
Kelly 1376 - Depends on your taste in MILFs. She's real, but someone here likened her to the "landlady in the movie Kingpin".
Ms Allie Steelz 3404 - She's real, always see new pics in her ad, curvy girl, looks fun....but hard to get a bead on her exactly. Reviews are mixed to say the most. But hard to say if that's people being mean, or that she's a "party girl" and all the problems going with it. Last thread about her was edited and locked out, so I really don't know what she's all about.
Lyndsay Hart 6556 - She's real, IIRC. There was a review here at one point, years ago, but it's gone now. She's a "party girl", not sure how far gone though.
"Maddythebaddy" 8310 - Seems real enough, I think I've seen her ads before coming in and out of the scene.
Keona - cute native girl, works part-time, ads pop up then are taken down.
Lacey Lust 0677 - You'll see her ads everywhere, she's real, but she's been 20 years old for 10 years now, and still keeps posting ads. "Party Girl" too, be wary.
Maria Bonita 5343 - Curvy Latina, well advertised and reviewed.
Sensual Sam 0642 - MILF, Good reviews
Other ads you'll see are either too new to tell, or obvious scams.