I am a Tibetan Buddhist and there is a TB smoke offering practice that involves making copious amounts of juniper smoke. After the summer of 2012 when we had three separate forest fires within 30 miles of here (2 within 5 miles) I decided to forgo it for a while as people are a little jumpy when they see smoke now.
It can also be done indoors using small amounts on a charcoal disk. There is a lot of juniper, two species, in the foothills around here but only a couple of scraggly specimens on my small lot. I'd love to plant more of some nicer varieties but nursery prices for trees are killer.
That will make you nervous about smoke alright-happened here a few years ago, too-there had been several forest fires about 30-40 miles away, and an unattended trash fire on the next road got loose and burned about 27 wooded acres before it was put out. Because part of that was a county park and trails, the person who left that fire unattended was fined for every tree over a certain size, in addition to the other damages. Every VFD was on edge for the better part of two years.
I do buy the charcoal discs on sites on the net sometimes, but out here, there is always oak charcoal for sale for grilling, and it can be gotten instantly...