Jackson local here. Spread Creek used to be a go-to spot for locals to camp, quick and easy from town. It's been overrun with out-of-towners the last few summers, so noone really goes there anymore - except in the fall for elk hunting/scouting.
I've camped up there a few times - it's a great spot. It'd be an easy place to bury someone poorly and get them hidden from view, but a very challenging place to conceal the site and get deep enough to evade a cadaver dog. Local coroner was called up to Spread Creek about 45 minutes ago. What a shame. The Laundrie family should be ashamed of themselves, but it also sounds like there was nothing they could do for Gabby - crazy they basically gave their son a chance to either escape or commit suicide.