I once had a garden with morels!
The paths had been covered in that garden with wood chips from willows. Pine trees were nearby but I'd never seen morels under the trees. But, timing is everything!
One day, as the last of the snow was melting, I was walking in the garden. There was nothing to do out there - freezing most every night, probably still 25% of the ground covered with snow. I began seeing morels! Here, there - a good hat full at a time.
I know a guy who was quite a morel hunter in his younger years. He said that the secret to finding them in the woods is to get down low to the ground and look for lifting to the forest litter. Where there has been a fire and the litter is burned off - they are just easier to see. But, in their usual environment, not only are they "camouflaged" but they hide.
Yes, the aphids do like morels.
Steve