I decided to go to Helsinki to attend Assembly 2013. I was kind of mixed on it as I'm a little burnt out but some friends told me I had to go see Finland and with their encouragement I went.
Since I was there alone I didn't stay for the entire event. Apparently most people go with friends and stay all 4 days which includes sleeping at the arena in your own sleeping bag all 3 nights. They have showers. I just went the first day to see what it was like and then came back the night of the 3rd day to see most of the competitions.