Don't they punch a hole in the old license to indicate that it is no longer valid?
they do that to the passport, but i didn't think they did that to the license? at least, i still have a couple of in-tact old licenses. but i've always renewed when the actual expiration was coming up soon. i don't know what happens if you have a couple of years left before it expires.
and jdawg, the wedding is in late september, and the honeymoon is in late december (missing christmas...sorry, mom!)