I've done the Tulsa Wannenmaker show several times in the past. It is worth the drive from KC. Unlike some Gun N Knife shows, this one actually has lots of knives. There are literally several acres of tables (4000 tables? I think) The only problem I have is with the parking. If you show up a little later around 11-12ish, you can probably find closer parking, otherwise you're out in the boonies, or you have to get there mighty early.
I usually head on down to NW Arkansas, stay the night before with my parents, then drive over to Tulsa first thing in the morning. I've left at 7 to get there by 9, and leave around 5:00. So, 8 hours, and still not enough time to see all the stuff.
Bring a small carryable folding chair, or stool, if you can. And forget about leaving for lunch. Just bring an extra $5-10 for the chili dogs, burgers, or funnel cakes. Bring your own bottle of water, and fill it at the water fountains, otherwise you'll be paying too much. The vendors are usually a group of Eastern European youngsters, some of them pretty cute.
I'll be there in the spring.
Hey, if you do get down there, Grim, could you pick up a pound of the XXX hot sausages for me? Hopefully the vendor will be there. He usually has a large variety of stuff, and the HOT stuff is my favorite.
D2