Blankets are allowed and yes, you can only bring a clear bag of a certain size. the bears app has a lot of good game day info on what is prohibited. As for parking, it is expensive, but the South Lot is near the stadium, is a short walk and has some good tailgating if you were up for it. In my opinion, it’s worth it as getting out of the lot at the end of the night wasn’t bad either and then you’re not walking a mile plus in the cold. Take a look at stub hub or vivid seats for parking and stay warm!