Did you catch your LMB in tight to the bank? Your SMB, at least the bigger ones for me are not going to be as tight to the bank as the Largies. To be honest with you I catch my SMB on the same lures I use for LMB. I know some people say you need to downsize, but I don't. I catch them on 1/4oz., 3/8oz and 1/2oz foot ball jigs with craw trailers or chompers double tailed grubs. I've also used spinner baits, 10inch Berkly power worms and the new Rage Anaconda worms also 10inch, Berkly beast, Tubes, brushhogs, punch hogs, flappin hogs and cranks.
When I target SMB I usually key into points or shorelines leading into points. I wear polarized glasses, so I can see bottom, and I'm looking for where I can see the bottom go from a light color to where it turns dark. Meaning the drop-off from where it goes from 5 feet to 8-10 feet fairly quick. I then cast whatever I'm fishing parallel to this change in depth and work it back using different lures and retrieves until I find a lure and action combination that works. I don't know if this makes any sense? but this is how I have been catching my smallies. I think you have seen my last couple of smallie post. Good luck and keep at it, you will finally find something that works. It took me awhile to figure out the early SMB bite, I didn't just go out and start catching them on the first outing. Well I did this season but that's because I put in many, many hours of fishing the last several years.