I've been using Bubba Pucks (bisquette savers) for about 10 years, with no damage to any of my generators. They rest on my bisquette burner until my food is done, which could be well over 12 hours if I'm smoking a butt. Often longer, if I forget to remove them until my next cook.

What are you planning to cook, using intermittent smoke?
At what cabinet temperatures?
Also how much actual smoke will you be applying?