Hey Jagular, I'm in Olathe.  I guess I'll have to run down to Fort Scott this year and check out the park.
You might want to take a look at http://www.jdorv.com if you didn't already know about it.  It's an ORV park in Joplin, Mo.
Yep. Local 4wd club, KC4WDA, has trail rides there maybe 2 times but definately once a year. KC4WDA has plan runs once a month, plus social events, plus a meeting once a month. I went last time (Oct. IIRC) with the Bronco.
As for the KSRocksPark, I'll be there on the 17th weekend, and 2/7th weekend.
For the 17th, I'll be there with the Bronco as I've gotten it to run pretty well now (hard idling and highway running problems). The 7th, I should have the -7 there. Come on down and I'll show you around either weekend.
To add, there will be a Suzuki owners run in Disney, OK on 2/14-15 called the ZukFreeze. I'll either be there on the 14th with a Sami, or the -7. PM me if you are interested.