I used to work in HR (in MN, in fact - small world) and we did extensive background checks. We were looking for things like assault, embezzlement, and such, not DUIs. In my years there, no one was ever turned down for that reason.
So, my advice is to put them down and not be majorly concerned about it.
Good luck and let us knows how it goes, k?
phinny
P.S. This is a great opportunity to put yourself out there and then let it go!