gary olson
Member
any one ever used smoke bombs to check air currents when deer hunting.
"Smoke in a bottle" will work for you.
If you're going to be out west, thermals will move downhill from before sunup till about 9 am. You'll feel them speed up right when the sun comes up. Don't confuse thermals with wind, they're different.
Seems that if you know that you don't need smoke; just a good watch and thermometer.