Do not clean veil area. To find worms, squeeze the stem. If you feel soft spots that run up and down, it probably has worms. Hoppers is another infestation. Examine the gill area for tiny red hopping insects.
Infested mushrooms have a minimum or no commercial value.
The best container is a plastic bucket. Drill holes in side and bottom to allow air circulation, and put a lid on. Stack the mushrooms in the bucket, gills down. The gill area is the focus of commercial value. Take precautions to protect it.