This discussion should probably go in a different forum, but whatever I'm still going to answer.
tl;dr: Lines are long, spending 2 days may be smart. Maybe lines are short some weekdays, but I'm not sure I believe it.
From my experience in 2013, I needed 2 days. I'm so thankful I had 2 days or else I would've had to make some terribly tough decisions and definitely not gotten to ride everything. I don't recall what day of the week I went (I probably would've avoided a Saturday but other than that, no idea). I waited at least 2 hours for Millenium Force and TTD, and I waited longer for Maverick (it closed down for a little bit, I don't remember why, it might've been a short rain shower or there might have been technical difficulties... yeah I guess I have a bad memory) but probably would have been about 2 hours without delays. Basically, the lines were LONG. I was expecting it though. However, late at night close to closing, Wicked Twister was a walk-on. I rode it at least twice. I suppose all lines get shorter at closing time but I wasn't expecting any walk ons during my whole trip to CP so I was happy
I have a friend who lives closer to CP and tried to tell me that it's not crowded all the time and there are no lines on weekdays. I don't really believe it, but maybe you will be lucky and she will be right. But maybe for someone who grows up with CP, their definition of "no line" is a 30 min to 1 hour wait
