The best way to avoid GOP shenanigans is to vote early. It looks like 1/3 of voters will be doing the same. The AP says:
"Nationwide, about a third of the electorate is expected to vote early this year, thanks to expanded early voting provisions and fewer restrictions on absentee voting, researchers project. In all, more than 30 states allow any registered voter to cast an early ballot, some in person and others by mail."
With the polls heavily favoring Obama, this should minimize the sleazy last-ditch efforts that the GOP is sure to wage. Maybe no October surprise?