yes...when the veils break away from the caps... i always air dry on a screen or vented shelving... can ad dehumidifyers or decicant stuff to remove air and moisture
One thing to note is that most mushrooms will almost double in size once the veil has broken. This is a significant factor as weight usually accounts for the growing purpose.
There are still debates as to whether or not psilocybin production stops as soon as the veil tears. In my experience, it does slow down, but does not stop. If you don't mind huge mushrooms with black spores all over them, by all means let your fruit fully mature.
I always harvest just as the veil starts to tear, i want it attached as much as i can. However for "bag appeal" or "big caps" alot of people around here like them fully open, i tried to explain it to a few, but soon gave up trying