Scout,
I just got on here and saw the post. I am relatively close--- a little less than an hour. Seems like you are needing a pull behind grill. I checked with the teacher across the hall and am working on checking into some of the local cattlemens associations that I know have some pretty big rigs.
I am going to try to check with the local guy around here, but she said the Joplin Regional Stock yard has a big pull behind grill and the contact guys last name is Harmon. I can look intoit after school, but if you are wanting to get in touch now there number is 417-548-2333.
If anyone needs a place to stay, they can call me at 417-354-4801.
Brad