If the cleaners use the proper chemicals and the mold returns (and there are no leaks, drips, and adequate ventilation), call the mold ghostbusters!

Do the cleaners make more money if there is a pet? 

My cleaners handle it for me which is standard in my market and the markup to drain, fill and clean is only around $25 on top of the cleaning fee if I am not mistaken.  

My STRs are in a small destination mountain town and finding good cleaners is the #1 struggle. 

I'm guessing because it is probably more of a sure thing with higher occupancy and more cleaners/handyman companies etc? 

I keep in reasonable regular contact with guests before their stay but I will not provide access or location information earlier than an hour or two before their stay, as I have had people show up before guests have left and before cleaners have finished.

The cleaners would fire me and my cabins just don't seem like they're spacious enough to shove in German Shepards and Great Danes.

You can hire a cleaner to clean, charge the tenant who left the space dirty and not leave your high-paying job to do low-wage work. 

If they really mean a local contact, find a good cleaner and they will be your contact locally.

It's affordable and helps prevent erosion while providing a cleaner look compared to mud.3.