Finding smallies in the 'summer' can be challenging - it is for me.
They seem to move all over the place - here today, gone tomorrow.
Such opportunistic feeders that are very willing to travel quite a ways.
My limited success with summer smallies comes from two basic thoughts.
First - where they are during low light (early & late) seems different from where they hang out once the sun gets up a bit. So my approach early & late is to fish the shallower areas on or near the spots you listed above (drop-offs , shelves, humps, etc.) Especially areas that have an decent food source - for me that's almost always perch & / or crayfish. One of my favorite & top producing areas on most every SMB lake I fish, is "Inside Turns." Once I can identify what depth they are using, following a contour line and hitting the inside turn of Points, drop-offs, humps & saddle areas - and especially 'funnels" (where the bottom structure is such that the fish can 'run the lane' in the deep water, and shoot up shallow at any point along it to eat).
Now as you mentioned 'there are so many areas' on any lake that can be potential bass fishing areas. Where does one start ? This is where the second part of my very basic plan comes into play.
A starting point - By going to where you know the SMB spawned (where the beds are) and expanding from there, one can often locate a few. Simply expand your search from shallow to deep until you connect. Remembering that early & late they could be pretty shallow and move out as the day continues. Where & how far is the hard part.
I usually don't use my electronics here to find fish, although it happens more now with the 360 imaging, more often I'm looking for bait & cover. Rocks & bottom composition transition areas can be good. And even if & when I find them, I have all but given up on trying to catch 'suspending' fish. Super tough. Every once in a while I can get a few to go, but can be & has been a frustrating deal.
Early & late I'm using topwater & moving baits (depending on the wind) and once I start to look "deeper" I am almost always throwing a drop shot. But a drop shot can be a 'search bait' just use a small nose hooked swimbait, fluke, craw or a small curly tail worm or whatever you have confidence. Something that will not twist your line and that you can fish deep and bump along the bottom. Cast it out - work it back - repeat. This process ALWAYS includes a ton of 'eliminating water'. No way around it. What I have found is that the old adage "10% of the lake holds 90% of the fish" is more or less A Fact !
Hope that helps and don't despair - there's a reason it's a rare event that a big smallie is posted up in the middle of July & early August . . .
Good Luck
A-Jay