In reality, I don't think you'll end up with much more than an hour to kill. If you have checked bags and need to pick up a rental car, it could easily take you over an hour to get out of the airport. It will take you about half an hour to drive (give or take ten minutes, depending on where you're staying), and even if you are quick about eating, you'll still have to decide where, and you'll still have to wait for the staff to serve you - so that will take a minimum of half an hour by my estimations.
Having said that, a really cool thing to do would be to do the indoors skydiving on I-drive. The men in our group loved it! You will need to call ahead to schedule a time, but you should be able to be there by 3:15, I would think.
We sent the boys there while we did girly stuff (Orchid World and groceries), and the timing worked out nearly perfectly. Which is not to say that the skydiving wouldn't appeal to women, but for us, Orchid World and groceries didn't appeal to the boys. After, we got to watch a video of the boys.
If you aren't getting major provisions, there is a Walgreen's with some groceries right next to the indoors skydiving place. If one of you opts out of the skydiving, then that person could pick up a few things while the others prep, and still get back in time to watch the actual skydive. Have fun!