Well, I hate to beat a dead horse (or frosted plants), but wanted to show you a photo of part of our pumpkin patch. As you can see, the leaves look pretty sad (click on the photo to enlarge it) but there are still some untouched leaves so I'm going to leave the plants alone. The pumpkins still seem to be ripening as well.
I'd recommend you just leave your winter squash and pumpkin plants in place, at least until we're due for a hard frost. Then, as I mentioned in my last post, cut them off the vines -- leaving a few inches of stem on each squash or pumpkin -- and put them somewhere where they can sit in a warm, dry and protected area for two weeks.
This will help them mature a little more and last even longer in storage.