Oh ok qupers. One easy spot (but also easily detected with a dog) is if you were to open up your hatch, pop a couple rivits off, and put it behind you interior panel...

Still thinking about under the hood. It would have to be in a path of your air induction. So the air will cool it enough not to mess something up like melting the baggie, or burning the bud. there should be some spots behind your headlights. Or possibly if you have a rubberized inner wheel-well, you could cut an open ended square to make a flap... then tie it back down somehow. It would be out of sight... away from heat and not a real obvious place to look.