Some games allow the clans to sell clan specific items, but they don't want clan tents competing with the merchants as the merchants pay a lot more to be there. There should be a good group of merchants at this game, so I'm sure you will find something.
Of course Salado is a very artsy little town, so your wife may want to spend another day or so shopping there. My wife usually takes off on Saturday afternoon to hit a few of her favorite stores while we're there.
Midland is a ways to drive. If you are looking for lodging (and if Salado is booked), you might try Belton, TX as it is very close.
You might want to bring some lawn chairs so you can watch the games, the dance competition, or the pipe/drum competition without having to stand.
Several xmarkers will have clan tents there too, so feel free to come by and visit. We usually try to get a group picture on Saturday afternoon, usually around 1-2pm so I hope you will be around then.