If you are in the area, do this. You get free (donation box) wine/beer while you wait for the tours and all sorts of fun Texas games to play on their grounds. The tour is very interesting and unique.
I purchased a $6.50 shot glass. I gave the clerk $20.00. He gave me $6.00 in change & immediately walked away. After I got his attention, he said "good catch" & gave me the correct amount of change.
Not impressed. Everything is way expensive. Tour 20 bucks on the weekend? Gift shop items are ridiculously expensive. 3.25 for a "splash" of whiskey in your tea.