I'll be a second year next freshers week and I'm still going to be at my summer job during freshers week. It's a depressing prospect, given how much I enjoyed freshers week last week, but needing the monies, and I'm guessing it's only really good in first year.
My advice for new first years would be to talk to as many people as possible, as 98% of my friends from uni are people I met in freshers week. Also, don't go in with too many expectations, just let it all happen. Also try and find stuff to do during the day as it can get incredibly boring being sat in your room all day.