I don't myself train my dogs for anything other than various sport work. I do train with two retired cops currently who train bomb. cadaver and drug dogs and select patrol dogs. I've also worked with others, but not currently. They all use containers that are wire or plastic with whatever scent they are working inside. Everything from decaying flesh, to human bones and drugs.
It all starts with touch and mark/click then build to where they have to go touch and click, then find click, then teach the indicating behavior they want and back up a few steps and connect them, then on to full on searches. all the "scent" articles are kept free from human contact, so all sorts of latex gloves and such are used and the articles are kept in a pretty secure box so they aren't "contaminated" by other scents, but mainly in the beginning so it's not confused with live human scent or handler scent. I usually do all the hides for them.
Not many hide a reward with what they're searching for, but sometimes will if the dog needs it, but it is quickly faded. all manners of rewards are used. Whatever gets the dog fired up the most, food of all sorts of balls of all sorts, tug toys, fluffy stuffed bears they can shred, etc. Whatever they like best, but most are more than willing to work for a ball or food, so it makes it pretty easy.
I didn't read the link, but it sounds like it's similiar to what most i know do.