Good deal. I'm not a member, but my in laws are, so I usually go as their guest. It doesn't take much to get my MIL and wife out there to shoot as they love to shoot. My MIL is actually pretty good in the pistol range.
The addicks range is open Friday afternoon and all day Saturday and Sunday. It is leased from the corp so an RSO must be present. If you are an RSO you can go anytime.