Smoke is a fine cover scent. Always has been.
No such thing as a "cover" scent! But smoke does kill and inhibit bacteria growth! Smoking meat is not just to add flavor, was originally used to kill and inhibit bacteria growth long before we had a big side by side frig or chest freezer! lol
Much debate has been had on this subject over the years with very mixed results and opinions on how/if it actually works/helps while hunting. I personally cant stand to have the smoke smell on my clothes and hair for long periods of time, makes me about sick!