My gals tend to wait until the house is quiet and dark before they whelp. But normally we stick to our regular routine until those sure tell tell signs of stage one labor have begun. Than confinement to the whelping box during the day and night with me close by on the couch.
At day 55 you still have a ways to go... Here is a site that will help you determine what those tell tell signs are if you don't already know. Debbie Jenson site is full of an overwhelming source of information and I am sure you will find yourself referring to it on many occasions.
Canine Reproduction Video and Book on Breeding and Whelping dogs by Debbie Jensen for dog breeders and Whelping Supplies needed to deliver puppies.