Not only do you need to worry about the Guppies eating them, but they will eat each other as well. Once they molt they are very soft and in great danger of being a snack. The babies I had ate each other at a rapid pace.
You can move them into another tank and try giving them lots of places to hide. The mom will get rid of the eggs which aren't viable. You will eventually be able to see the babies inside the eggs most likely.
If it is a new mom dwarf crayfish, she might end up dropping the eggs all together. They are inexperienced and need to develop skill in keeping them fanned.
Make sure to keep the water parameters in perfect condition. Gently vac the tank before they are hatched. It is impossible to do for awhile after they are newly arrived.
As it will be more difficult to do pwc
when they are skittering around in the tank.
Though you can do the pwc
by catching the water coming out of the overflow in a cup if you have a HOB
*****Make sure to cover the intake of the filter with a sponge prefilter to keep them from getting sucked up.