Patience.  This wilting could be just transplant shock a the berry bushes recover from the trauma of being transplanted. This is why it is often easier to move or add berry plants to the garden when they are dormant or still leafless from winter. It sounds like you have done everything possible to keep them hydrated so I am going to predict the wilting will subside in a couple more days. Just keep the soil moist and wait it our. Keep growing, Marianne Binetti