I have three gelded males (ages 3, 3 and 7) who are doing great on lead and walking on our trails. I just bought a very nice Alpaca Pack (https://llamaproducts.com/alpaca-pack.html) and would like suggestions on how to proceed with the training to get them to accept the pack. There are three padded belly straps and a chest strap as well as removable saddle bags. I am thinking to start by just placing something like a small towel on their back and get them desensitized to having anything on their back and then proceeding from there. Thanks. Marie from Port Townsend, Washington