I rent out my packers for overnight trips, mostly in western Washington and usually in pairs. These trips are not guided and the renters determine the location of the trip.
My llama experience dates from 1982 and involves training, breeding and packing. Conditioning is the most important factor for a safe, pleasant pack trip, so my packers are conditioned at least a month prior to any trips. For longer trips, I would expect the humans to be in good shape, just like the llamas.
✓ Day Rental
✓ Overnight Rental
✓ pack clinic or proof of experience
✓ transportation to/from site or trailhead
✓ trail permits