I'm currently training my dog in scent detection, for my assessment for the same course (NDTF). When i finish with my little girl, to other people it probably doesn't look like i'm giving much reward at all. But just my getting down at her level and giving her a bit of a scruff made her start prancing around like she'd made the find of the century! but while still training, i give alot of reward and reinforcement.
on the other hand, when "sin-binning", for example when she jumps up on me and scratches, i give a firm "argh!" and just turn and walk back inside. I don't put her away, as such, simply because i don't have anywhere to put her away at the moment! but just me not giving her attention, seems to do the trick. She only shows that particular behaviour when shes REALLY REALLY amped up, and competing with the other dogs for attention.