From what I've heard from the FWP over the year is the best genetics for horn length, generally, come from the smaller isolated ranges like the bridgers, crazies, tobacco roots, square butte and the highwoods. I'm not sure why that is. I do know there is certainly more than one 10" goat in the bridgers alive today. Problem with goats and especially units like 393 that only give 5 tags is that 3-4 of the tag holders don't have a clue what they are doing and subsequently don't shoot a goat that represents the unit's potential. Goats are damn tough to judge and I'm probably going to be most hunters aren't going to be able to tell an 8" billy from a 10" billy. Some of the folks who draw some of those premium and easy to hunt goat areas end up shooting a nanny and younger billies because they 1) can't tell the difference, 2) don't care and are not motivated, and 3) aren't willing to spend the time passing up decent mature animals. I know of nannies and young billies taken from the bridgers that horns get over 10" in just 2-3 years of age.
If you want an easy hunt with big goats, go with any of the above mentioned units. I'm going to stick to applying for a more wilderness backcountry experience and hopefully find a big mature billy with good hair and 9" or better horns.