Taylor,
Did you buy a wetsuit?
Sorry about the slow response. So you are going to Stephenville (TSU) ??
It looks to me like you only have a few choices for dive sites. PK has always been a favorite stand by around here.
I won't say much about PK. I have tried diving it before and I don't like it; but my opinion is in the minority here. Also, I am not sure what the public access capability is for PK anymore. There used to be a dive park on the water but that's since become a trailer park, hotel, restaurant or some such nonsense.
You also have Lake Whitney (whitney, tx) as a dive option. I have been diving there. It's okay; especially if you just need to blow bubbles. Plus, it might be closer to Stephenville than PK!
Other than that, you could perform a Texas Swamp Divers Public Service Action. You could find a new dive site for us! I know I have seen a few threads in here regarding Lake Brownwood but I am not sure I have ever seen a dive report. Therefore, I don't know anything about L. Brownwood.
There used to be a really cool dive site just outside of Glen Rose, called Squaw Creek. Alas! It's been closed to the public as part of our post 9/11 national security.