Four Children, 22,25,28,30. I've smoked, publicly, for 35 years. Two of my kids are smokers, two are not. My ex smoked cigaretts and I smoked a massive amount of weed while running a business. All of my children are; honest, hard working, bright thinking individuals with college gegrees and careers. Read some of my other posts follow the link back to my public profile then read some of the pieces that apply to you. Read the others for fun.
It can be done, and it is stressful, the the children are perfect mimics and they will follow your lead in dealing with the straight world. Just take a moderate amount of care. What you want to avoid is teaching the kids to be sneaky. then they will learn to be sneakier than you and well it's all down hill from there
Doctor G