We did OK on Sunday, but Saturday of course was the big one. I'm pretty new at all this vendor show stuff, but it sure seems like the slow Sunday kind of feeds on itself. If there are no people, some vendors start packing stuff up. But I would sure think most would be more than happy to stay if there are people there to sell to.
If you want to be able to spend time talking with vendors without so many people around Sunday is definately the day to do it. Shoot bows without lines, heck, you could probably shoot twice as many bows in half the amount of time on Sunday. And maybe even pick up a deal on something that a vendor doesn't want to haul home again.
It seems like people have figured out that Friday is a good day to get there ahead of the crowd. I would think coming in on their heels would be as good or better!