Freshers was really well planned this year (I'm a current 1st year) They gave you like a booklet that had a grid of everything going on everyday. Btw there is no way you'll make (or possibly want to) everything. The main things are the engine shed every night of freshers. They sell like a deal on tickets, its about £30 for one for every night. I bought them all and ended up selling 3 to people in the queue on various nights as i wanted to go to stuff in town instead. It was good to have the choice though.
Playzone, I think they planned 2 days to go last sept. I was like anybody who wanted to go met at a meeting point and they walked everybody together (so you don't get lost).
P.s don't worry about making friends, in freshers most people don't know anybody and the 1st couple of nights people tend to go out with their new flat mates as they are the only people you've met until you start classes. Everybody worries about it, but just have fun and don't spend all your loan, you'll regret it in December. teehee