That's a lot of tape, a variety of different containment materials, and likely a LOT of scent transfer. Substrate, blanket or towel, tape dispenser, tape, second bag, tape dispenser, tape, third container, tape dispenser, tape etc. Then not to mention vehicle transfer. Door handle, substrate in vehicle, steering wheel, etc. So the timing of only a couple minutes wouldn't matter, because the dog would likely be alerting to scent transfer particles. Does that make any sense? Hope you feel better soon!