It CAN be a good area, but it is VERY hit or miss. Here are a couple of points you might want to consider:
1) The area in general is more "winter range" than prime "summer range"...that's partly why it was purchased many years ago. Don't count on much "weather" to push bulls into the area in Sept. either - the habitat/elevation isn't conducive to that, especially in Sept.;
2) There is a LOT of Oil and Gas development activity in there, so human traffic can be high at times/places. While there are a PILE of roads you can hike, access is OPEN for energy vehicles - you can't drive the roads, but the energy folks will be;
3) The property is surrounded by a GIGANTIC chunks of private property - the Hill Ranch (where some of the Eastman's guys have hunted in the past) and the Tercio Ranch (GREAT habitat) - that are managed for trophy bulls. While that can help with having big bulls in the area, it can also HURT by giving big bulls a refuge AWAY from the public pressure/human activity on the Bosque.
Don't get me wrong, there CAN be decent bulls in there, BUT... if you draw it (and put in your leg work), be happy with hunting under the idea "If I find one, it should be a good one", BUT understand that...you might not find one! PM me if you want any other info...