i have experience with forgetting the dates... (oops!) and the last week seems to take forever. i have had their temps drop and go back up. I would still just keep as close a check on her as possible. You can't stay with her 24/7 so just accept the reality that you might miss the first pup if you actually sleep, take a shower, go to the store, or god forbid go to work so you can pay for puppy chow next month! LOL, just kidding ya. The good news is bigger dogs often whelp and unwrap the babies all on their own just fine, unlike toy poodles, who often just push them out and say "I'm done" and unless you open the sac, clear the airway, break the cord and start them breathing you will have a litter of cellophane wrapped little dead poodle babies. If she has to do it on her own, she will probably do fine, especially if she has already whelped before.
One thing that helps me to know is to express the milk and if it is clearish or yellowish, it is early, and when it turns stark white they are closer, not neccesarily that day, but in a day or two if it is blazing white and not bluish looking.