Maybe I am just cold, but I have never once considered letting a doe with fawns pass. Maybe it was also becuase then I would probably rarely if ever, be able to shoot a doe. I saw around 30 deer last night and all the adult does had twins except for 2 that had singles. Any of those moms are fair game come saturday mornign, and a few of those plump youngins aren't free of danger either. Especially if I have my longbow in hand.

I've always taken the outlook of doe "harvesting" as "shoot early and shoot often"