RE: Grape koolaid
Several years ago when I "actively" hunted hogs, I would bury corn soaked in cherry koolaid to draw the hogs in, and supposedly, the smell of the koolaid would draw the hogs. If you just poured the corn on the ground, it would be gone within hours, but with it buried 2-3 ft deep, it would take them a couple of days to root it all out.
I honestly can't say how much the koolaid played into the equation, but I did kill quite few hogs during that time.
Koolaid is cheap, so why not give it a try?