I plugged a screw hole in my Bridgestone with one of those car tire plug kits a few hundred miles ago and it's holding fine. Can't hardly tell where it was now because it blended in good.. A screw leaves a pretty good size hole. Stop leak might be worth a shot, but you might need to plug it.
I'm sure some will come on and say you absolutely have to get a new tire.. For myself, I would plug it.. ride the bike some before you take off on your trip.. and if all is well, take off and enjoy Kentucky.. Some beautiful riding up there!