What exercises are best for a weakling novice climber?

Hi all. Sorry if this is in the wiki, I didn't see anything relevant. I'm going on a short climbing trip this weekend with some friends, I'm looking to hit the gym hard early this week to prepare (I haven't been in months). What exercises would you suggest are best for a novice, that I can do without being too sore for the weekend? I don't plan on exerting myself, but I'd like to enjoy myself without complaining about my general state of weakness. Dead lifts for example, as wonderful as they are, might seem a waste of time? Thanks for your help!