Dream Theater

Hello guys. I'm from Romania, but since Hungary is one of my country's neighbours, it would have been foolish of me not to take part in the magnificent concert event at the end of this week.
Friday will be my last day of exams for this term and I couldn't think of a better way to celebrate than going to my absolute favourite band's show!
I do have a question: what are the chances of my backpack being confiscated at the entrance of Budapest Sports Arena, if it doesn't contain any of the usual concert prohibited' items, like umbrellas?...and sharp objects, binoculars, drugs and alcoholic beverages? The only chances for me and my mother (with whom I'm going and is a huge DT fan:>) to get to the event in time is to go directly from the airport, where our plane arrives no later than 7:00 PM local time, to the venue...or so I think. If you have any opinions would like to share, please fel free to do so.