Free Fallsview Casino Parking - overnight stay?

Hi everyone,

We are going to Niagara Falls for my birthday. We will arrive on Friday and leave on Sunday. The hotel parking rate is crazy, so to save on costs I'm thinking to park at Fallsview Casino for free parking. After reading older posts, it looks like you have to spend $20 on your PAC card on the day you exit the parking garage to qualify for free parking. I've always received free parking in the past, but they have always been day trips, and I always spent a minimum of $20 at the casino. Since they do not track when you come in (they don't give you an entrance ticket, and you don't swipe your PAC card on entry), I'm wondering if they care how many days you park there. Any advice?