I would love an answer to this also. But I know very well that you or me are not going to get a answer lol. It's a waste land out here.
We get mostly bait and switch girls and a lot of scams.
Every once and a while a decent touring girl might show up but it's not very often. And when they do it's only for a few days.
Nothing consistent and no locals that I know of and I'm consistently looking .
Your best bet is Orillia even better Barrie or even better, better lol Toronto.
Or you can try to find girls that will outcall to Muskoka but be prepared for a massive upcharge for travel...
If you do find something let me know, I've been looking ever since I moved here 5 years ago