If you look just at what she said, we don't know if she meant a few days prior to him being reported missing.
"I keep thinking, I keep thinking of what could have happened, you know, and I keep thinking back to these two people, um.... that were outside of my house a few days prior,um, a black man and white woman."
Does she mean a few days prior to reporting him missing, or a few days prior to something happening to Lucas? We assume that it's one of those things, but she doesn't give any detail.
There was a report that stated she gave the date of the 11th as the day she saw the strangers. It wasn't in her own words, and I'll be dipped if I can remember what article it was.
There was a time a few years back when I was a pretty heavy pot smoker. And even at my heaviest usage, I never smoked a 'few' bowls' in one trip to a location where I was comfortable smoking, whether 'few' meant 2 or 20 in my language (a few is 3-5, to me personally). Even when it was cheap, mild ditch weed. A few bowls over the course of the day? Yeah, I've done that, lots of times. But I can't imagine have a 'few' BOWLS in a short amount of time and being functional. Like everything else she says - something is off. IMO, she either misspoke and meant 'few hits off a bowl' (unlikely, IMO), or 'few bowls over the course of the whole day' (more likely).
That said - I'm curious about her personal idea of how many a 'few' is.