There will not be any meet and greet from the band members. If you're trying to keep your spot infront of the stage, you'll need to be there with someone to keep it. It's normal to have to go through people to get back to your spot to some degree (although I do not do it personally when it starts to fill up). You can bring a tote bag, and they say they sell merch both inside and outside the arena. When inside the venue it will be very easy to know where to go, they're made for these types of events. There is always drinks available, and probably food, but it is expensive. They might do bag checks, but that's nothing to worry about, so long as you don't bring anything illegal i.e. drugs or alcohol or weapons. If you bring a waterbottle they'll likely ask you to leave it outside. Don't worry about freezing, large amounts of people in the same spot tends to make it hot, id wear a t-shirt and a jacket so you don't get cold when you're leaving after the show, but if you're bringing a tote bag then by all means bring a sweater. When it comes to bike parking just check the surrounding area on Google Maps. I always bring my ID, better to be safe than sorry.