Sorry, what do the parents smoking have to do with anything?
And I don't buy that the man and child seen at the store were dad and lil DeOrr. How is dad meant to hide a wriggly, active, noisy 2.5 year old for around 5 hours, then in the middle of a search disappear to the store, with a wailing child and not be noticed by those at the campsite searching? That's just impossible really. Ok the woman may have seen a man and a kid in the store, but how many crying 2.5 year old blond boys are in Idaho? I reckon quite a few. Same with black pick up trucks. We've had nothing confirming that the man or the child were dad and DeOrr, and if they had been then LE would have been pushing dad for an explanation.
The smoking was in reference to a post saying that smoking could affect DeOrr's scent re: tracking dogs. We also don't have anything confirming that the man or child were not DeOrrs Sr and Jr. I'm betting LE knows if it was them and what time the two people were at the store. We also don't know who was at the campsite when, except that DK said they (he and JM or all 4 adults?) didn't leave the campsite after 1 pm.