Still plenty of time to visit vendors on Sunday morning. Some do start taking down after noon or so. The traffic in the tent is much lower on Sunday than it is on Friday and Saturday, so you might actually have better luck talking to bowyers and other vendors when they aren't quite so busy.
I believe the targets are up during the afternoon yet, and since many people are packing up their camps it can be a great time to shoot without the crowds.
Show up early on Sunday - cruise the vendor tents in the morning and shoot the courses all afternoon. Heck yeah, it's worth the drive!