Alright, I went out there friday afternoon and did some shooting. Here's the deal...
The area has gotten overgrown, where it was once all gravel and shells, there are now 3 foot weeds, so wear pants and boots when you go. A machette may not be a bad idea either in case a bush is in your line of fire.
Shooting is allwed from 9am to 5pm. Weekdays aren't too bad, but if you're going on a weekend, get there early, maybe 8 or so, the range gets really busy on saturday and sunday.
The sun is REALLY hot, take something to shade yourself, or at least to keep your guns out of direct sunlight
Take a truck if you've got one. The dirt roads aren't bad, but trucks seem to like them more than cars.
Bring water or gatorade.
Technically, targets are only supposed to be paper or clay. This rule hasn't really been enforced, but occasionally on the weekends the rangers will come out and watch everyone, it would be a good idea to at least have some paper and clay targets available to use.
Bring trashbags, try to haul off more than you brought in.
Keep a gun on your hip. If you're out there alone, there have been some instances of robberies out there. If you're out there with a group, just be sure to have a pistol on you when you go down range, on very few occasions (never actually seen it, but heard form friends) some idiot will fire while you're down range.
Keep an eye on everyone else there. They're not all the brightest, or safest. If the latter is true, it'd be a good idea to back off the firing line and wait for them to finish.
As for directions, I come from the back way and can't remember how to get there from houston. So hopefully someone else can give directions.
With a big group going it would be a good idea for some of us to get there even earlier than 8. If a few of us went we could set up an area, maybe a grill, and just hang out till everyone shows up. If anyone has an easy up, or a canopy of some sort, those are great for keeping the sun off.