I think TMS being more centrally located than Mineral Wells is key. In addition to the fact that the 4 hotels in MW are usually full so it's dificult to get a room and there's no entertainment or restraunt chains nearby.
Personally I'd rather run at TMS than MW for those reasons. And TMS has great restrooms and trees to sit under and relax and picnic tables etc. :-)
Also don't forget next year Pearsall will be available. Then you got Houston, and hopefully TMS, and maybe??? a Louisiana div as well? If that's the case then we could count the best 4 and minimum of 3? Also the Friday party at TMS last time I was there was kinda neat. Indoor registration, tech right behind. All that extra effort made an impact on me and I sort of miss it. Plus that should allow corner workers to cover a smaller area given the lot size.