I would till in the mushroom compost especially if it is fresh as it will be full of active biological ingredients. We got a pickup load right from a shed many years ago and had mushrooms coming up for 2 years as it wasn’t composted.
The verdict is in, I will till it in. I just gotta wait for it to dry out enough to work with.
Thanks.
We have had 3 inches of rain in the last 5 days. Today was the first partly sunny day. I went out & spread the compost. The raised beds are still too wet to till, I want to mix the soil - not make mud bricks.
Maybe tomorrow.