Here people claim you need dead rotting elms, but I know a guy that has several rotting elms and not one morel, he can go about 300 feet away and find the morels.
I have the same thing in my woods, dead rotting elms. I have never seen any Morels growing in or around them. The few I was lucky enough to find were growing out in the open on the edge of my lawn.
Maybe one or two dead elms in our woods. Mostly all Cottonwood. Almost everywhere I’ve found them have been in Cottonwood timber.
I know guys that used to count mushrooms by the gallon. One of those old timers said they've cleaned thousands and thousands of mushrooms at their camp picnic table over the years and years of hunting. His take was that if you could grow morels where you wanted to that they should be growing all around that picnic table and they never found one there. AND... that was at a camp, in the forest, where they were found... you'd think conditions would be pretty good there.
I think you’d have to move that table around the woods and clean shrooms on it in different spots to know for sure. We find them in certain spots, and never in other spots in our woods. Nothing I can see is different, but the shrooms definitely notice a difference.
Around a fresh Cottonwood blow down can be a crazy good spot, especially by the root ball. I commonly find them around where I cut down a cottonwood for fire wood also but not as many as a wind fall tree. Mostly likely because of the lack of root ball ripped out and maybe removing the wood doesn’t help them either.