Hello and welcome.
I'm in St. Louis as well. Wildwood to be exact. You are lucky in that we have two excellent fly shops in St. Louis (Feather-Craft Fly Fishing | Fly Fishing Rods, Reels, Waders, Flies, Fly Tying Materials | Sage Rods | Simms Waders | Since 1955
) and (T. Hargrove Fly Fishing
). Both of which are located on Manchester a mile east and west respectively from Brentwood Blvd. FC has more stock, Hargroves has been known to have a more "Cheers" atmosphere. FC has recently undergone a major customer service overhaul as their former shop mgr. was known to be a bit aloof. If you go there ask for Russ, Dan or Evan. They can hook you up.
As far as our trout streams go you really don't need
a 9' 5 or 6wt. rig unless you are going to do a lot of indicator/multi rig nymphing. If you are going to fish our one big tailwater (Taneycomo) a lot then you will want one, but if you are going to fish BSC, Little Piney, MC, Current for trout then a 3 or 4wt will work nicely. BSC, Little Piney and MC are all heavily wooded streams behind you. BSC and MC have dense overhead canopies so my weapon of choice for all three is a fiberglass 7'3 3 wt. made by (http://cbarclayflyrods.com
). Chris is a local St. Louis guy who builds an outstanding rod. The Current is more open so a 9' rod is fine if that is your cup of tea. That shorter rod or another rod of similar ilk will serve you well also on that small private stream for long ears, gills and small bass.
A couple of other little items. The Orvis 7'9 5wt "Far & Fine" model is something to consider. When I'm not fishing my 3wt glass I'm grabbing that and it is my primary rod for our small stream Ozark smallies. handles nymphing for me on the Current for trout and easily handles the smaller streamer patterns I use for smallies. While this rod is a discontinued model you can contact Jim West at the Orvis custom shop. He can roll an identical blank and ship it to you at around $140.00 or build you a rod for close to $350.00.
Last thing. There is another fly shop not too close, but not too far away in Lebanon, MO just outside of Bennett Springs State Park. Reading's Fly Shop. I don't think he has a real website, but here is his Facebook page. (https://www.facebook.com/pages/Readi...04649066267440
) He has a ton of stock, glass, boo, graphite and a nice selection of used equipment. He also has a bona fide casting pond. Just something to consider.
If you need anything else don't hesitate to give me a shout via PM or email and yes, I will be happy to fish with you on your private stream.