Sheet mulching creates an explosion of worms in the soil. So I've always wanted to do this in the garden bed during the summer while crops are growing.
But whenever I've attempted this before, raccoons would always come and dig it up and mess up the nearby plants.
Here's a method that's so far solved this problem.
Place about a gallon of scraps in a small 4" deep hole. Cover with a little dirt and then wood chip mulch.
Then cover with a 1'x1' piece of chicken wire and secure. Make sure all sides of the chicken wire have sharp points.
This method will allow me to add scraps, even meat and fish scraps, in between growing plants.