I pulled of a similar trick here in west Knox Co., TN. Oct. 19 was the opening day and my voting place was mobbed all day. I waited a week until yesterday and voted at about 2:50 p.m. when I thought there would be very few people. I was right. Got in with no line and voted immediately, taking all of 10 minutes or so. My advice: Make your best guess as to when there will be an off day with an off time and vote then.
Another good thing about early voting is now I feel relieved that I got it out of the way. Who knows what could happen on Election Day. At least now I KNOW my vote has been cast.