Where is the best place to learn about saddle and pad fitting a horse? In my lifetime I would have to say a Saddle Horse and Pack String Outfitter or a Riding Stable. The second choice is a working ranch that uses the horse to get the jobs done that a horse or mule is needed for.
I know in your mind you asking why? The why is sometimes thought of as saddle string, dude horse, rental horse, dude ranch horse. A lot of horses owners rental operations as the end of the line for a horse or mule. Which is far from the truth.
The truth is that horse or mule is worth its weight in Gold. That horse can earn upwards of $640 a day at today's prices by working 8 hours a day. Most of those horses work 8 hours a day and they do it 7 days a week for a possible income of $4,480 a week, A monthly income of $17,900 in the riding season for people who rent a horse to ride for one reason or another. One day off or one month or several months off due to saddle sores that critter is not making any income and costing the owner money. So saddle and pad fit are very important. Not only from an income point of view but also for the comfort of the horse and the health condition of the horse.
The majority of owners give these horses and mules the best care possible and the best saddle and pad/blanket fit they can. Besides the best housing, feed, farrier, and vet work.
What better place to learn saddle fit from than an owner who respects the horse or mule and wants the best for his charges?
Some of these stables, ranches, and outfitters run hundreds of horses and a few may own a thousand head. In the past, the Historic Bar X ranch ran 2000 head of saddle, pack, and wagon stock in Glacier National Park. Today many of the Outfitters in our National Park and Nation Forest run/rent horses and mules that number into the hundreds. As well as those in State, County Parks, City Parks, and private land.
You don't want or need saddle sores!