The Google Earth is something I admit I haven't gotten good at, so great call F&F. Also the shade you mentioned is what I look for too, especially mid day.
Since I normally fish out of a jet boat its easier to go back and fish an area later in the day if I know there's a big fish there, but I know that's not possible with a canoe. But I usually will look for water that's splitting in 2 different directions usually at the front of a hole. There's normally a couple of fish there and are feeding. It seems to me on average they are smaller fish than the ones at the end of the hole though.
The fish on the end are typically the biggest fish, don't know why but it seems to just work that way. Maybe because the big fish are just lazy. I will usually eliminate the entire middle section of a hole when the hole is large enough to create frog water in the middle (opposite of the winter)
On the Meramec there are so many logs that the logs aren't a premium like they are on the Gasconade. On the Gasconade you can almost bet every big log near or in current will hold a fish, which allows you to eliminate more water..... not so on the Meramec. On the Meramec, you need to be focused on which are the most productive logs, ones near wood or sand...with current or without, or fast or slow current. Logs on rocks with current are a premium no matter where you're at. Also logs across the river from a Rocky bluff, the majority of guys will fish the rocky bluff and never fish the logs across the river. My 2 cents