Packs and Panniers are a great source of argument among llama packers, there are those who swear by one thing or another, I use what I got at a good price, Idaho Llama Gear, which is out of business now built aluminum Sawbucks from which the panniers hung. They work very well, for a saddle pad I use carpet samples from Home depot, they are thick and cushy and cheap.
Regarding transport, Even from Truckee in the Sierra the east side trails were up to 6 hours away, now that we are on the coast, times will be similar, but, there you go.
Another couple of llama items.
They walk at 2-2.5 mph, roughly what I hike at or a little slower, but a fine and reasonable pace. I seldom do more than 10 miles a day, which is a tad less than I do backpacking, but, keeping the beasts safe and sound is the most important thing. I do carry a pistol in case I have to put one down (easier than bashing in its head with a rock, but, I have never had to do so and never intend to.
Training, buy trained llamas, they don't cost much, I have never spent more than $1,000 and two of my strongest packers were free. As far as obstacle, creek crossing, leading, On the job training is the key. As you walk and train you and the llamas are getting fit.
I got my first date with my wife by convincing her little girls that they would just love a llama hike, but you have to clear it with your mother, naturally she had to come along, which was the whole point! Our lives together grew with llama trips, horsepack trips (yes we do that also) and hikes. Romantic little buggers those llamas are.