Congrats man, you have made it! Must feel like getting out of prison! Twenty one years is a very long time to wait. I bet you have already made up your mind and are most likely going to pick the Weneha rifle hunt but I'll throw in my observations. As a NR you can't draw the Walla Walla rifle tag ever. Not gonna happen. The outfitters buy up the NR tag before it even hits the shelf, so you can scratch that one off the list.
And if your going solo you should not bow hunt. Not having a caller is going to hurt you and besides, it sounds like you don't want to bow hunt anyway. With the rifle hunt you can glass bulls and pick the one you want, whereas when you call them in you're only getting to look at one. You can only reasonable hope to call one bull a day..of course you'll see more, but unless you get really pumped up by screaming elk you should not do the bow hunt. It sounds like you want the biggest bull possible and the fun part is secondary, so it's best to leave these bow hunts to the real stick and string guys.
Another problem with those archery hunts is all spike tags they put out. Don't get me wrong, the rifle hunt has them too, but a lot of the archery spike guys aren't there to kill a spike, they are there to call in some monster bulls for the fun of it. So you are gonna be dealing with lots of other folks calling. A lot of them are locals and will have the peak of the rut timed perfect. Not something you want to deal with after 21 years.
A lot of guys on the edge of drawing put in for the spike tag the year before, second choice of course , and go over to learn the unit. It's not too late for you to do that, you got till the 31st to modify your app. Sounds like the perfect family vacation lol.
I would look hard mt Emily. They just killed a 439 out of there and a 373. I heard there were two 400+ models that came out there last year. Weneha also produces the goods as you know. You're gonna have a hard time getting away from other guys even with the wilderness. Be prepared to follow a long trail of horse manure.
So from your original six hunts I've narrowed it down to two for ya. They are both incredible hunts and you can't lose either way. I would personally pick mt Emily just because it so damn pretty in there. But it's up to you..