We hunted there last week, for management Gemsbok. My 12 y/o son scored. I'll write and post pictures of that adventure soon.
We saw several javelina. They were all by the stand near the Windmill in the Northeast part of the "South Vaca" pasture.
They really like 20% Protein Range Cubes. I picked them up at Tractor Supply, and a few of the other guys picked them up at the feedstore in Mason.
It takes a rough "4WD Only" road to get there. Exactly what my Rubicon was made for
I believe he assigned us that area because I had the Jeep. I'd also add that it seems like the compartments get assigned as you arrive, so I'd try to be early
Take a camera, lots off really cool stuff to see.
Watch out for scorpions - I killed one in the bathroom of the Lodge.
They have a walk in cooler and big ice machine - no reason to haul ice from Houston, like I did.
Congratulations, you should have a great trip. Mason Mountain is just Awesome!!!!