it's a very special place, do the tag justice by spending as much time as possible in there learning the lay of the land.... it's worth it. the very best way to kill a big bull in weneha is go find your own program, the general advice you will get on a forum will only get you so far (and probably not on that big bull you are dreaming of) good old fashion boots on the ground is the only way to achieve your goal (unless someone gives you a hot tip in private) learning the country is part of the experience, and getting some good maps is a good starting point.
my buddy drew the archery tag a couple years ago, and he worked hard finding his own program. we avoided the general advice you normally hear regarding weneha, and we were in big bulls non stop and had them to ourselves. it's a unit with huge potential, and it's just an awesome place to run around.... there are lots of angles on hunting areas and strategy, and like anything related to hunting, if you want a good experience, do the work yourself and find your own little niche, that's how you will find that big bull you're after.
probably not the info you were looking for, but i think it's very realistic advice..... there are big bulls, and it will be lucky to kill a big one in well known, easy, or obvious spots. you have to do your own work if you want to find a really good bull over there.
on the other end, there are lots of very respectable size bulls anywhere else running around. we saw more 280-300" 6 points than little rag bulls, there are lots of them.... it will take work or luck to find a good mature bull (imo 320"+) and with a tag like that, i wouldn't bank on luck.
glassing canyons first and last light, and dropping into them during the day worked well for us, but that was leading up to archery season and during. it's a special place, i fell in love with it.... i spend some time over there now, and plan on spending a lot more in the future.
i will probably never get the chance to hunt it for elk, but i sure would like to. it's the ONLY place in oregon that would get me off the coast in September. still lots of elk, and some dandy bulls there, don't get discouraged when people act like the wolves ate them all. the wolves are bad news, but it's still an amazing elk unit, but it's gonna be tough, and you have to familiarize yourself with that country, and figure out a few areas you want to focus on.
get over there every chance you get. we were even going on super short scouting trips, leaving one evening, getting up on the mountain after midnight, getting up in the dark, glass and scout all day and drive home 7.5hrs that night.... that's what we had to work with, and it was very much worth it. no substitute for work in the elk woods.
hope to hear about your experiences, both scouting and hunting.