We have done some jumping with smoke in the past .
First of all the stuff I used is "Poison" where gloves when handling .
Second when flying your jumper over grassland ore forest " YOU ARE FLYING WITH FIRE UNDER YOUR JUMPER "
When jumping, make sure your parachute is diploid and is steering correctly, before igniting your smoke flair .
If the diver is landing in your parachute ,you end up with a big burning hole in your chute !

Some photos of the setup I used ,this is not meaning there is no other way of doing this .
TowerHobbys was selling these smoke flairs in the past
The wire where the fuse is going through is chrome wire.


Jules