Just my .02 cents...
You gotta go there once just to check it out. After that, it's a preference thing.
Weekends are a total zoo. I've been there before where every parking space was taken and every possible fishing spot had multiple people fishing side by side.
I've also been there mid week were i've been the only one there. But you can usually expect some light company midweek.
As for the fish, they are very impressive to look at, and some can really hit hard and fight pretty well. It is especially cool to have a 5 or more pound trout nail a dry fly on a quiet evening - but that happens less than you'd hope.
Don't always expect to find lots of big fish. I've been there before where you see them just about everywhere. But I've also been there where you really had to work just to spot a couple. Also, if you hit it shortly after it has been stocked, you may find it hard to avoid the 8 to 12 inchers.
And remember that these fish are about as 'sore mouthed' as you'll find. Many of them I've caught fought about as well as an old boot. But then you'll get one that manages a tail walk, and all is well again.
Bring logs of wooly buggers and leeches in black, brown, olive, and white. I sent an out of town buddy and his brother (about average or less skill) over there once to at least look at some nice fish. When they returned and I asked how they did, he just smiled and handed me a thick stack of pictures of him and his brother holding 2 to 6lb trout - about 10 or more each landed and 15 or more each hooked and lost. They ended up losing (to fish) the dozen wooley buggers I sent with them (size and color did not matter), and they even hit some dry flies for them. I have heard of thsi kind of feeding frenzy out there, but I'm usually happy with 2 or 3 fish. And the first several times I went, the best I could muster was hooking a couple and having them break my tippet.
Good luck, and let us know now it goes!