It's really hard to fish for bass and trout at the same time. You use completely different gear and lures for those two species. So first of all, pick one.
You have caught Smallmouth bass on "Largemouth lures" because you were fishing for black bass. (Smallmouth, Largemouth, Spotted)
I used to live beside a great Smallmouth Bass river in Virginia, for about 5 years. The overwhelming majority of my bass, including 8 trophies, were caught on a Cabin Creek 4" Salty Critter Gitter (Green Pumpkin- Color #96) rigged with a 1/16th ounce Oldhams weedless Jig head. I used spinning tackle with a 10 lb test line. The common name of the lure that I use/used is "tube jig". You can easily find them online or a sporting goods store if you have one close to where you live.
Just cast the jig up current and let the lure float down, jigging it every once in a while. The smallies just wait, behind rocks or around current breaks, for baitfish/crawfish to float down stream; that way they have to expend less energy to get a meal as opposed to fighting the current.
If the water isn't too swift, I also like to use a Yum Dinger 5" rigged weightless with a 3/0 Gamakatsu hook. The dinger is great for all species of black bass, I use it everywhere from ponds to large reservoirs.
Hope this helps.
